I mean who has it actually hit for people to get this Idea that it cant be dodged
Same can be said for Susanoo arrow
Kabuto evaded a arrow and yet there are plenty of people faster than him
It was Kabuto in his
Sage Mode. If he physically dodged Susanno's arrows then he's
obviously extremely fast... Even Kakashi said the only thing he could do was Kamui the arrow away because it was so fast, and we all know Kakashi is no sluggish shinobi. Not to mention this was before Sasuke mastered his Susanno.
The TBB is referred to as "unavoidable" because even if it missed you you'll still get caught in it's blast radius. The TBB are powerful enough to destroy mountains:
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Are you trying to imply that people can run the length of an entire mountain in
mere seconds to avoid this technique's blast radius? Not even Naruto characters can do that except for the obvious exceptions. Even if the TBB missed you by 100 meters you'll still be dead.
Unless it's people who have the level of speed necessary to dodge it completely, or have unique techniques that can divert it away, there's not much you can do against a TBB coming right at you. Even Gai and Kakashi would have died facing it if it weren't for KM Naruto.