uBlock Origin Lite doesn't support fetching filter lists from the internet (all lists are hard-coded in the extension itself) so every time YouTube tweaks their ads, you need to wait (potentially, multiple days) for Google to review and approve an updated extension. Very clear incentive mismatch.

Can't YouTube change the ad serving domain every day making all MV3 ad block extensions useless (because of the hardcoded list + review delay)?

Yep, that's exactly the incentive mismatch! A great feature of (regular, non-Lite) uBlock Origin are exactly its frequently-updated "quick fixes" and "unbreak" filter lists. The former updates every 12 hours, and has been instrumental in keeping the YouTube experience smooth https://old.reddit.com/r/uBlockOrigin/comments/1etvawp/youtu...