Or to put it another way: Not being able to recover access is not something most people will accept and if your technical security measures don't consider that they will be worked around. If people need to go through support to recover their DNS more often then support will be used to giving out access to people's account and that will also reduce YOUR actual security.
Yes, it takes hard discipline--which may lapse no matter the level of experience--to setup offsite recovery with true cryptographic secrets, but it is possible. You can say backup a KeePass file to BackBlaze, protected by a 7-word passphrase. Now all you need for recovery is access to BackBlaze (so same as a centralized service) and your memory of the passphrase, with no one but you having access.
I don't know what the stakes are for most social media accounts or websites. But wouldn't it bring some peace of mind if say Graphene's registrar couldn't just press one button to serve malware on grapheneos.org, which you won't detect until you compare the hashes with say Twitter?