Yes, it's a matter different from the sorts of goals or aspirations you can achieve alone.

[ Or with training, assistance, or tools. Subaru briefly considers how best to explain something which may be wholeheartedly foreign, unable to gauge what will be plausible to present company, but ultimately he can do little for it. ]

In the case of something you couldn't attain that way — for instance, travel between worlds — your wish would require two things. The first is someone capable of brokering that exchange. The second is what you'll be expected to give for it.

[ He only knows of one person who fits the bill when it comes to the former. As for the latter... ]

I can hardly imagine the price to be paid for one world, let alone all of them.