It’s not as if the OP can’t install a different OS that does support x64 processors. The OP is describing a Hackintosh, so there is no vendor lock in. For that matter, installing alternatives on x64 based Macs is also reasonably trivial and as Apple silicon matures, so does the reverse-engineering knowledge (much like it did with the ‘commodity’ PC components used for Linux today), and the vendor lock in issue disappears.