I advocate for "was this page helpful?" being the standard question across docs sites because ultimately it does reflect the purpose of documentation (to be helpful in one way or another, which usually means helping you complete a task or understand a concept) and because using the same question on all sites enables us to benchmark and compare. I once ran an A/B test on the same page where 50% were prompted "was this page helpful?" and the other 50% were prompted "was this page useful?" and the results were different to a statistically significant degree which suggests that even minor rephrasings skew the results, so we need to all use the same terminology.

> its a request for feedback I don't know helps me or not

Yes I'm aware that readers aren't incentivized to respond which explains why it's rare to get higher than 5% response rate. This situation is a microcosm for documentation's overall problem: we can't find incentives for people to voluntarily and consistently confirm the value we provide and we don't have any other means to prove the causality.