Still, on the whole I do agree with their stance that fighting games need to be more accessible if they intend to stay popular. The age of people spending 6 months to learn to move in Quake properly are generally over, people don't have that kind of patience and dedication. You need to give newcomers a sense that they still have at least some chance or they'll get frustrated and quit.
I miss those days... I grew up with Quake 2 as my first multiplayer and competitive game... I will always have very fond memories of it. There are still games that require a lot of time to become decent at, for example, starcraft 2, tekken. Those are about the only ones I can really think of off the top of my head though. They are becoming quite rare, because as you said, people want accessible games.
Thus why games such as World of Warcraft and League of Legends are among the biggest games in the world.