The problem is, when people make things up, like “Water vapor is a feedback and not a forcing”, there isn’t any evidence that such a statement exists, except where somebody made it up.
You won’t find it in a textbook, or any scientific paper, or even on a real climate science page.
Instead you get blogs, where people say all kinds of stupid things, but don’t back it up with science. Evidence. Note that the 9 hits are all blogs.
If you type any real phrase into Google scholar, or Google, you get real sources right away, not a few blogs. Like “Water vapor acts as a greenhouse gas”, which returns real science sources, like www.upi.com
carnegiescience.edu/news/water_evaporated_trees_cools_global_climate
https://www-airs.jpl.nasa.gov/climate/
Same for Google scholar, so it’s easy to see it’s a real phrase, from science. Not bloggers.