You can choose not to use it at all. My main profile does not and all work fine. Non privacy respecting/ goggle dependent apps I keep in a separate profile.
You can’t do that on calyx.
Since play on GOS is toothless , while microG is a hacked up job yea it’s better. Microg is ofc amazing , but still a have issues.
Love it , wouldnt work where i live , no flat roads. , Would be a new extreme sport going downhill though :) but I think I am gonna go for the one in the comments perhaps https://hackaday.io/project/180836-desk-ercising-with-the-exer-desk