Because I have not had my Doze reset (except read below) on my phones daily, I don't think its a thing. Including on my Pixel 4a running stock ROMs for almost 2 years. That google phone should of been pretty close to ASOP and of course running the latest Play Services. If anything, I think google would of been over-reaching in their treatment of "their devices".
The exception to the above, is that a few months ago I switched to a heavily modified custom ROM (Bliss A11) which has MANY battery optimisation's. One of the things it appears to do in its optimisation's, is reset my doze settings, which blows away my custom doze. ie its not the play services but the ROM. The more I think of play services modding doze (beyond a wake-lock or whitelisting) on a device., the more it sounds like an overreach.
EDIT: PS its not just Vending that is whitelisted.