Well
the first thing is that my USD transactions arent visible to anyone with a block explorer

but sure
if central banks just give up running the world and go away peacefully (lol) the world would be better on a bitcoin standard.

in actual fact however,
self-custody would be criminalized and we would be using paper bitcoin. only the elites would actually touch the chain and nothing would be very different.
except everyone could easily see if you moved a UTXO of course.