Teach's pirate crew was composed of 9 people, among them people who were no match for Ace, against a yonkou with multiple fleet an allies in a position where he was already having his hands full against Sengoku, Garp and half the marines. It's easy for Shanks not to fear in a situation where the enemy is already in difficulties, it's easy to be capable to defeat someone on his own when you have an army of monsters on your side. And it's not like the gorosei knew the exact strength of Teach. We've seen what they finally did in 2 years. None of them(including the wary Shanks you mention) managed to stop him achieving all Whitebeard territories and becoming a yonkou and continuing his aim of power
"Teach, your man is the one who did this"
"And it's not like i was careless or anything"
"You know what i'm trying to say right?"
Yes we do know. He was trying to say Teach is a monster that should be avoided. And that was pre-yami yami Teach
Have you ever heard of the workings of tramways? Crossing an entire country is impressive to you? Fodder Hodi could do that with a water shot in fishmen island
Also, you do realise it's Teach the monster we're talking about right? The same one who accomplished almost all Whitebeard feats with the gura fruit during the war in one-go. Comparing him to Enel is ridiculous
1. It still stands that Teach could have fought Shanks one on one. Yami Gura Teach didn't want to face Shanks and Shanks would have also have to have dealt with the entire Marine force there. There were far more on the side against Shanks than there was with him, so it more than balances out. It still stands that Shanks challenged Yami Gura Teach directly, and Teach admitted he wasn't ready. Shanks was not scared of Teach, he was wary of him.
2. Still doesn't change that we have no idea how strong Shanks was then. It's a shallow feat.
3. As expected, you were unable to understand the points. I was not comparing Enel to Teach. I was citing examples of how someone loss to someone else besides having a stronger DF. This shows that simply having the best DF isn't a guaranteed win. Shit, Teach, with the best DF, cowered from Whitebeard who lost access to his DF.
The point wasn't "Oh spanning a country, super impressive!" but whether or not you'd expect that ability to do such a thing. Since you're just going to dodge the question, as is your debating style, I'll elaborate on the point further to help you along. It's not the fruit, it's how you use it. The power to make and control strings is weak, but Doflamingo, because of how strong he is and how he uses it, makes it a fearsome ability. An expert with a stone can kill a novice with a gun.