I've personally always thought that tlds was dumb. I never understood why things needed to be partitioned like that. Is there any technical reason to have them

I've personally always thought that tlds was dumb. I never understood why things needed to be partitioned like that. Is there any technical reason to have them? Also, it's very bothersome that domains are backwards. It's always irked me. That being said, the amount of money required for a gTLD is absurd.