Don't get me wrong, I am very much in that camp too and spend a lot of my time contributing to F/OSS projects. Having the freedom to tweak, debug and improve software is awesome.

My main objection here is that there are a lot of intelligent and polite people that are not developers and being left out in the cold. We need another option where users can rent out a server (from a multitude of providers) and install webapps as easily as installing phone apps. We are slowly getting there with Docker images but it's still very technical to do so.

EDIT: there is also https://sandstorm.io/ that tries to tackle this problem but isn't very popular yet