Nobody on Earth* will restrict themselves to using only websites, operating systems, and software and hardware packages which are fully free and open source. That would be insanely restrictive, and generally speaking -- at the risk of being blunt -- you'd be resorting to consistently using lower-quality, less-supported software a lot of the time†.
I'm sure he's got some valid points, but his approach to modern technology based on them essentially involves reverting back to the days of the extremely early internet, where the actual person-to-person networking was restricted to mailing lists and IRC; two formats which the majority of internet users today likely wouldn't be crazy about compared to the alternatives.
* who wants to be a normal and productive member of modern society
† not that there isn't great F/OSS software out there -- Linux and BSD are absolute wonders compared to Windows, but a lot of the time it's like comparing the GIMP to Photoshop -- there's just more refinement in a piece of software developed by thousands of paid, dedicated, full-time developers over two or so decades.