I think what he means is that Bitcoin Unlimited has given freedom of choice to the people who didn't want to run Core (or who wanted to make adjustments), but didn't have the aptitude to code and compile their own clients.  Along with XT, it's also created competition, which I think resonates with a lot of people as a sort of "balancing of powers," as it were.  Of course, if people choose to run Core when given other options, then that is their free choice as well.