The problem with randomly installing GNU/Linux is the hardware in general
isn't well supported. It'll work today although not tomorrow. There really
isn't a problem with Ubuntu on hardware which is better supported from an
ease of use perspective.
Getting people to move away from a non-free OS to a mostly free OS /w
non-free pieces can also create its own problems. By attracting such users
who are willing to accept non-free pieces you introduce disincentive to those
supporting free software.
If Ubuntu has 90% of the GNU/Linux market it is harder to make the argument
that free software is a necessity for companies to support GNU/Linux.
