What a weird take. I see it the other way round: if you can run GrapheneOS, run GrapheneOS, period. If you can't, then there is a really cool project called LineageOS that you probably can run, and you should look into it :-).
Although as an extension of that - I'm hesitant to use software written by people with such a philosophical difference. It might work today, but I wouldn't trust it to work tomorrow.
Anyways, since you're here perhaps you can answer my question from the other subthread: If I flash GOS and then flash Magisk on it, how hard is it to stay unbricked? Is it as easy as declining to relock the bootloader once, or is the system going to actively fight me on every boot?