installing a just-works distro (say linux mint) is just/almost as easy as grapheneos. assuming not doing dual booting (the phone is dual booting is it).
librewolf (hardened fork of firefox) is like 2 commands on linux, or an installer wizard on windows.
unironically the last statement is based. less technology is always more secure. we managed without it back in the day didnt we.
im not going to say privacy and digital security is easy or one-size-fits-all or anything, we each have to make comprimises on convenience.