Obito doesn't need to interfere the wrap to the people next to him, because Kakashi is the one who is wrapping them. So if he intercepts Kakashi, he intercepts every wrap to the people next to Kakashi. He doesn't need to go after them. And no, blind. He wasn't between the objects wrapped around Kakashi and Gedo Mazo. Unless you want to circle them for me? Oh wait, you can't. Why didn't you say so?
Lel, then Obito just blitzes right through the sand and intercepts the wrap process again, Lol. Obito taking 3 panels to prepare TBB > Minato taking 3 chapters to set the markings. Do the Math. It took Gai most of the chapter to enter 8th Gate. [
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] [
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]. Each panel has motion of time. Obito summoning the tee [
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] and preparing TBB [
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]. Can you do simple time comparison? I hope so.
Let's even say the Kakashi wrap strategy works (which it won't, but I'll be generous with you): he wraps them and moment he wraps himself, Obito stops him from doing that and kills him in process. With Kakashi being dead, the others can't get out of the Kamui dimension, so that is an essential lost, as they will starve or hungry to death. (Apart from Minato, who can't do anything) So, your whole is a strategy is a fail; exactly like your post.
How can I work with idiots? It's impossible.