It’s more than that - he failed to create PayPal so his group bought a competitor, he didn’t found Tesla or spaceX - he claimed he did, then reached settlements with the actual founders to not contest his claims. He did start the boring company. It didn’t get off the ground because he can’t build a team
Because it’s a monopoly created by international agreement. It’s like a phone number - it needs to be routable in the system, but if you follow the standards, you can get integrated into the system as a registrar
The top level domains are owned by countries - the UK has .UK, the US has .com and .gov, the UK has .io (because they stole it), but most countries have just one. They charge a fee to register a secondary domain, and the registrar can charge whatever they want to their customers to register on their behalf
This is just the centralized system though - you could build your own, AOL tried to do that through “keywords” back in the 90s