I went out of my way to say it's only my preference to use React, but that Vue is fine too. So the thing I have a "hardline stance" (your words) on, if anything, is that a framework should be used for any interactive web app.

Having been a web developer for a quarter century, I know how tempting it is (yes, for small projects) to try to just wing it and do everything without a framework, and I know what a tarpit that way of thinking is. If you disagree, then you were certainly welcome to share you own opinion.