Sonic Adventure is INCREDIBLY glitchy. Remember the stone dragon in level 9? You couldn't stand still on that thing if you tried. I've died more times than I can count in Sonic Adventure 1, 2, and Heroes because the camera moved in such a way to kill me or even by falling straight through the floor for some reason or other.
People play games with glitches all the time. Some of my favorite games in history have major glitches. Final Fantasy VI has a nasty glitch with one of the characters that can actually erase save data, for instance. It's about whether the game is fun enough, and personally, I consider SRB2 to pass on the "fun" department.