I’ve been wondering how much of it comes down to optimizing for ad impressions. If you search, get a result, and it answers your question they sell one page of keyword ads. If you go back and forth a dozen times, they sell a dozen times as many impressions.

Given my usual behavior is to check two pages then add !g, where I check two pages and decide I don't need more info, I don't think that's a strong move.

I’m not saying it’s smart, just that I could easily imagine someone chasing the wrong metric or trying to balance revenue against the likelihood that you’ll stop using them. For example, in your scenario that’s still twice as many impressions so unless you make Google tour primary maybe that’s a win.