I find it highly amusing that people are bitching about self-custody when 99% of you HAVE BEEN USING CUSTODIANS FOR NEARLY YOUR ENTIRE LIFE. I guarantee you've kept most, if not all of your fiat in a bank and not under your mattress.
Custodians will exist. Self-custody for the masses is so far off and there are far too many people who just do not or will not have the mental capacity to fully self-custody their Bitcoin.
Get over it. In the meantime, there will be custodial solutions that can be beneficial until the masses are educated better and/or self-custody becomes stupidly easy.