...but inevitably, it will be used for tracking -- regardless of intent.
It might also get Google in trouble. Copying and pasting from the a comment in the OP's URL:
> Example: https://www.youtube.com - in network headers, look for x-client-data
> Now, go to https://ad.doubleclick.net/abc - and your browser also sends this magic x-client-data.
> It's a unique ID to track a specific Chrome instance across all Google properties.
> Really curious about your opinion, especially after the GDPR explicitly forbidding such tracking. Moreover, it doesn't make sense to anonymise user-agent if you have such backdoor.