So it’s basically because of laziness or lack of effort that no one wants anything better, or even just different. And that means ICANN/IANA can just casually break countless internet domains and cause a decade of internet bitrot at the drop of a hat and no one will challenge them over it.
no one wants anything better
More like there is nothing better people can agree on. You might like SCION with it’s RAINS architecture, where the trust anchors are local to the isolation domains. This way you could build up name resolution where you only depend on the local ISPs that form the core of your isolation domain. In my team we are supporting SCION, in fact we are in the core of one ISD, but the uptake on the customer side is relatively low so far. There are two or three niches that are using SCION more, but not RAINS yet, as far as I know.
even just different
Just different is not really attractive, unless people feel like IANA is really messing things up, or the US is exerting undue influence over it. So far they seem to have avoided making that impression widely.