hes crazy. he didnt aknowledge the real world or thought that it mattered. like what obito said in the cave when he was a kid '' ive caused alot of trouble but in the end i break even with the good'' could be taken as that with the tsukyomi.
im guessing that obito believes he'll be able to get them out on his own. kakashi thought he was going to die but gai saved him. who knows what will happen or how long itll take. and no eyes for naruto!!!....naruto with kamui tho lol