I was a fan of Pokemon in my teens as well, growing up with the first generations of it, but even back then it was obvious that it was a giant effort at making a franchise, preying on kids to buy as much as possible.
Keep in mind that this is an academic site and thus they probably have a certain self-imposed "standard", in which Pokemon is probably some of the lowest of low kind of "art" in the medium.
I wouldn't count on the cartoons, TCG or other toys as a benefit (in this discussion) by the way, if anything they were all, including the games, designed to support one another to get kids to buy
something, whether they were inspired by the game to buy a DVD or inspired by a plushie to buy the game, it didn't matter. This is probably the biggest detractor for Pokemon being the game that evolved into a cultural megasuccess rather than just a brand that might as well have been a line of clothes or shoes.
Until I could get most of my Gameboy games through the 3DS market, I still regularly picked up the old beige (yellow now) handheld to play Link's Awakening, but I've always ignored replaying the Pokemon games. They're just not that good.
Grinding through a pokedex, which is the only end goal, is anything but appealing to me, especially since I'd have to get another Gameboy and one of the other versions, in order to do it. The story and gameplay honestly doesn't do much to lift the original game(s) either. The best thing the game had going for it, were the unforgiving and downright unfair cave areas that mercilessly ground you to a pulp until you learned about using Repel. That was (and still is) a true gaming moment for a lot of people.
I would rate Pokemon as an undeniably gigantic financial success, but not a contender for the hall of fame for games.
At the same time, I'm just fine with the original Sims being in there.
Even though it became just as sleazy a franchise (although far less cutesy and original than Pokemon), it differed in the way that it wasn't just a digital toy collection, but a simulation that led to emergent gameplay and was a window into how "normal" people would do some pretty crazy and abhorrent things. Besides that, it was also one of the first sandbox games, that let people turn the idyllic initial neighborhood into something completely unrecognizable (also, mods!). It's kind of an unintentional "win" and it has led to some really crappy and abusive "casual" games that do everything they can to fleece you, but you could do a lifetime of studies into this one game.
Anyway, I get the feeling that I won't necessarily convince you with my arguments and I don't think you're wrong. This is so mired in subjective opinions (and probably a bit of east vs west politics) that we'll never find a truly objective answer. I also agree with you that the reach Pokemon had was a hell of a lot larger, so if that was the sole criteria, there'd be no contest between Pokemon and almost any other game out there (probably with the exception of World of Warcraft or League of Legends, for the sheer number of players).
My best guess, and I'm repeating myself here, is really just that it's a question of academic prefference. At the very least, it's a tangible argument you can stick to and be annoyed at them for not picking what you'd prefer