Pal , sorry for waiting this long but I couldn't answer quicker , everybody could use bomb and kill somebody , but bomb is not part of your power , on other side few people can awaken 8 gates through hard work and a lot time is needed for that , many years. You can't compare those two things.
I see your point and I thought about that (although it could be argued that you still need the skill or knowledge about how to set off the bomb which not everybody has). Nevertheless, I don't want to spend too much time on that analogy.
My ultimate point is basically this: A stronger person can actually truly win a battle and live to fight another day. It is like your Guy vs Iruka example. We all know that Guy >>>>>>> Iruka. If they were to fight Guy wouldn't have to even go 8 gates.
Here is a better example than the bomb analogy.
Do you remember when Vegeta exploded himself against Buu in DBZ? Had Buu died (which he did not), would that make Vegeta stronger in your eyes? To me, the answer is no. Here is why:
Consider a few questions:
1. Why did Vegeta resort to self destructing in the first place?
Answer: It was because he could not beat Buu. Why didn't Vegeta just finish Buu with his strongest final flash or big bang attack or galick gun? It is because as I said before, none of that would work. He simply could not beat Buu!
Do you see what I am getting at here? Suicide techniques are things you go for when you
truly and utterly just can't beat a person. In other words, that other person is stronger.
It is true that suicide techniques may give a person the power to kill their opponent (at the cost of their own life). However, in terms of pure combat analysis and pure versus matches, what is the point of considering it a win if you yourself don't live?
You see, when I think of versus matches, I think of competitions of pure self defense (where you are trying to kill your opponent for the sole purpose of staying alive yourself). Basically, the combatants are fighting each other solely because their opponent is trying to kill them (not to save the world, not for pride or glory or any other reason). Of course, if you don't stay alive yourself, then that defeats the whole purpose! If you commit suicide in a battle, then you ultimately failed in your goal of staying alive and surviving the threat that is your opponent.
With your argument of "If your opponent dies before you do then you win", you are more so looking at matches as if they are sporting events with technicalities. In other words, you are basically looking at it as if it were a boxing match where it holds true that if Mike Tyson punches an opponent so hard that it knocks Tyson out in addition to the opponent, then as long as the opponent hits the ground first then Tyson still wins despite being knocked out himself. That is how your argument looks at it.
My perspective doesn't include such "who died first" technicalities. My perspective is completely a mater of life and death. You are just fighting only to live, so if you use a suicide technique then you have failed and therefore lost the battle (or got a draw if you successfully finished your opponent).
Just in case you say something about this, let me clarify something:
There is a difference between simply dying after the battle and being defeated by your opponent. You are defeated if you die because of anything that your opponent did to you during the battle. Even if it is a suicide technique, you still only used that suicide technique because your opponent was beating you up or dominating you before that. Therefore you still died due to things that your opponent did to you. In other words, your opponent still killed you even if it was your own power.
Conversely, simply dying at a later point than the battle is when you die due to a cause that has absolutely nothing to do with the events of the battle or anything that your opponent did to you. For example, if Joe and Bob (I often use random names in examples) are fighting and Joe kills Bob, and then a minute after Bob dies, a drive by shooting randomly takes place and Joe gets killed, then that would be an example of Joe simply dying after the battle. Joe still won his battle against Bob. He just died due to some other random circumstance.
Anyway, that is why I say that you can't win with suicide techniques (at least not in true battles of life/death or self defense).
I will give you this however:
You can win a sporting event on a technicality with a suicide technique. That I do acknowledge.