Emm, somewhat you are right that custodial wallet can freeze our account at any time and even thay can seize our account too. that's why we should have to use popular and trustworthy service. I didn't here coinbase seized someones account without any reason, its true that they frequently ask for KYC for making their service more secured but I got them loyal.
To get rid of these hassles you can keep very little bitcoin in these accounts. Just keep as much bitcoin as you need to pay monthly coffee bills, and other bills here so that you don't have to incur huge losses even if they freeze your account.
If you have to adopt centralised services just to use Bitcoin for your payments, then you might as well use PayPal.
Coinbase is by no means a suitable alternative to rising fees and any other services like it doesn't serve as a suitable solution in the long run. Services like that will provide you with lower fees since the transfer is done within their own database, but you're sacrificing the transparency and the privacy of the individual. There's no company that would ever provide you with free services to transfer, there must be some strings attached. If you want to focus on low fees, I rather focus the efforts on LN and similar implementations.