We have linux phones these days, caly, and grapheneos. There really isn't reason to give up on general computing. (Ignoring the propriety baseband blobs.)
Sadly, nothing else comes even close to Apple in terms of security and privacy, especially for someone who is not an infosec specialist and doesn't have time to read CVEs all day.
The slope is so slippery that it's ot worth the risk, imo. It paves the way to reduce general computing even further, which is already quite restricted on apple devices to begin with.
Even for someone that is not an infosec specialist, they should be using something like Graphene for phones and something like Qubes for their OS.
Apple isn't great at all honestly, at least in terms of MacOS security - they mostly benefit from not being worth the time to target.