So why would Vegetto need a force field inside Buu? Because he needed a stronger defense, maybe?
So is an argument about a minor technical aspect of how Dragon Ball powers work your idea of a troll? Because last I checked, this was a legitimate topic of debate that's never been settled by the canon. There's just your opinion, my opinion, and whatever examples we can cobble together from statements, scenes, and outside sources (Such as looking at Alan Scott or HunterXHunter and how their defenses work, as they both work off channeling energy)
This thing you're doing though, this isn't an argument. For a guy ranting about trolls, you sure sling around a lot of uncalled for name calling.
Think I'll give you the win here, this is a little too toxic over absolutely nothing.