I think the point Jillian's trying to make is that ward housing (not apartments or FC rooms) should be accessible to everyone. Savage and Ultimate raids are accessible to everyone who wants to put the time in to do them. The same isn't true for housing. No matter how much time or effort a player puts in, the limited nature of the content will always exclude a portion of the player base. Until there's at least a single small plot available for each account on each server, the problem of accessibility will remain.
Are players entitled to a free plot just because they subscribe? I don't think so, no. Just like having to put forth effort to get into Ultimates and Savages, a player should have to put forth the effort to earn the gil necessary to buy the plot.
Like it or not, housing is content that's advertised as part of the game, just like dungeons and the Gold Saucer. How would you like it if you had to pay 5 million gold to get into a lottery in hopes of buying a ticket that would give you access to non-MSQ dungeons, raids, and trials and if you don't luck out, to bad, so sad, you can't do that content? It's an extreme example, but the premise is the same.
For some, housing is the content they want to spend their endgame being active in. I'm not a big raider so housing is what I spent most of my endgame time doing previously. Once I lost the love for it, I didn't have anything else to keep me interested in the game on a regular basis so I took a break. In a very real way, housing is content that keeps people subscribed and engaged in the game. Limiting that, for whatever reason they have, costs them good will from the players and subscription income.
Sometimes I wonder how much long-term profit they'd make from people remaining subscribed to the game by spending the money to create the capacity for each account to have a plot.