You can get weaker jails, that are more likely to get in your way, on Linux and other platforms that "just work-ish" though [1].

Default jails on Linux with Firejail really is just install the application and run a single command, to jail everything it knows about. Or just create symlinks manually to be more selective. Not a high bar.

Having the ability to customize means not having to change the way I do things to conform to the whims of some random company. Jails that "just work", but do not allow customization are jailing the user too.

[1] You will need to adjust the way you work to the way the jails are setup by default. Some things you may want to do will not work at all, or not in the way you want them to. Many things will not be as extensively jailed as you might like. Applies to any of, Android, iOS, Firejail, etc., using defaults.