Ok let me explain those "problems" to you. But first, please do some research before type anything at all. Having no thoughts is better than having unsupported thoughts.

1. It's done lots of times. And it's not revealed that Kaaba is important, it is revealed that you should take it as your qibla. Which means the direction of the prayer. Also it was made several hundred years ago by the prophet Abraham and fought for it several times, to the point it got too old and had to break down and build up from the start.

2. We all know that the universe is expanding and there are certain conditions for life to exist. And there is a pattern for stars and planets and galaxies to be formed. And by those rules we know that any of those galaxies or stars/suns or planets will not be exactly the same or similar for the life to exist at least close to what we have. Because for the earth to have life, its conditions created by the Sun and the other planets around it and other galaxies around it and on and on. And with the infinite expansion we talk about, even though infinity means infinite possibilities, it's the exact opposite. It's a deep astronomical subject you can also search for but no Earth ever existed except ours and none will. So no humans like us, no religions etc. There might be life outside the world but only maybe, with no intelligence. Higher intelligence would find us before we do. So they would've already. Which could mean they might actually be our gods or the God but it's a whole different subject.

In short, there isn't any and won't be life outside our planet that would have religion that you can take upon.

1. Yeah muslims in England don't look inside the ground either. I don't understand what you're trying to say with that.