Hi Adam. Thanks for your feedback.
The Core Web Vitals thresholds are based on a balance of looking to provide good user experience and achievability. They are intended to give site owners the visibility into where they could improve the user experience on their sites.
We recognise the extra challenges with Ads, and other third-party content, but that does not alter the fact that the experience could be improved.
One of the reasons we have given a one year lead time to making INP a Core Web Vital is to give the entire ecosystem the time to understand and improve INP. That falls on site owners, Ad and other third-party providers, and browser vendors. We are reaching out to all three (including GPT) and have already seen positive improvements in INP
since it was introduced last year. We hope that, with added focus, that can be improved further over the next year.