> why would someone include tech that makes people think twice about using the app, unless it is required if you want to "sell" in a particular venue.

Because the overwhelming majority of people don't think twice about this tech.

I do, and that's why I use a lot of web tools or old-fashioned phone calls, but most people think metadata=unimportant and assume that the purpose of the app is what it does for them rather than to gather their personal information for sale.