What has been shown for Obama is a certification of live birth from Hawaii. So yes, that is enough to prove he was born there. Trump is not disputing that either. Obama's long form with all the details has never been shown and the only reason would be there is something either on it he doesn't want to show the public or there is something missing. Either case must be embarrassing or he would simply have Hawaii post the thing on the web. Only he can give permission for that to happen, and since he has not, he has something he doesn't want the world to see.
I don't know why anyone really cares any more.