In short, because of how DNS servers work.
Each TLD has to be resolvable in the root servers and as far as I know ICANN doesn't manage root DNS servers and ICANN would have to become a registrar and coordinate all those TLDs with all the root servers all over the world.
I love cycling too and during the lockdowns of the pandemics I discovered that pedaling isn't what I love about cycling, I just got so bored of pedaling on the roller I just couldn't force myself doing it more than twice. Now when I get on my bike and ride for many kilometers I really enjoy it.
I tried a couple other apps for Reddit, including the official one, but never felt them quite as comfortable as rif. I also miss some of my go to subreddits but enjoying a bit of a detox
Slackware linux