Rockets are notoriously complicated, though. Only a few nations even managed to get to the orbit, and not for a lack of trying.

SpaceX is a rare bird - a space startup that actually achieved not just spaceflight, but (so far only partial) reusability of launchers. Most space startups died long before that, including Carmack's Armadillo Aerospace. Given that they are gone, we don't think of them often, but the total graveyard of defunct space startups is quite sizeable.

Russia seems to be slowly losing their space capabilities. The EU still does not have a human-rated launcher. These aren't small entities either.

Getting to space is a dangerous business with extremely thin security margins, where previous experience matters a lot.

I think China will eventually have reusable rockets, but it will take some time.