It's a key part of the game. There is no con about it being time consuming. It's also part of the entire concept of the game. And what do you mean not activated because of your current stats? Your stats have nothing to do with Social Links.
Links are activated by time of day, day of the week, the month, and if you have gotten other social links to a certain point. If you have a persona of the matching link with you, then you get a bonus towards leveling that link. It also doesn't take "forever". I think you either didn't pay attention to the tutorials, or the explanations of Slinks. If you don't like that system that's one thing, but the way you are talking you make it sound as though Slinks are some random game thing that takes "forever" to get working. That isn't the case.
It introduces girls to the fandom? WTF are you talking about?
I didn't know what to call it, but so I called them "Stats". I mean stuff like "Courage", "Charm," and "Intelligence." In P3, it was easier (after the second time with a clean slate, no New Game+), but P4 itself was a lot harder in this area because you have 5 (with 5 levels each) to work with...
I understand how S Links work. But the parts that annoy me is attempting to bump of an S.Link, and you get, "Your relationship may become closer soon!" and it's all "Well ****, it's not gonna level up..." Meaning, you wasted a day (nights are never wasted IMO) with that. And yes, I did pay attention to tutorials and ****, but I didn't fully understand it until I started using online guides for the game that...further explained things that I failed to pick up on.
But yeah, I still think that, if you're not using guides, they're time consuming, and you tend to forget about things because you either want to finish these S.Links or mainly go to Tartarus/Dungeons that you forget about side stuff like "Quests" and "Social Stats" (that's what I call them...Social Stats) that techically are equally as important, but...overall not so much but still be noted about. Especially since some things have a date limit (mostly Quests).
...And, seriously dude, you REALLY can't tell a joke when you see one? Goddamn, y'know, I can be REALLY mean and REALLY insulting right now, but I won't. I'm just not gonna say anything, 'cause damn it's not worth it.
Edit: And also, MAYBE you shouldn't be making assumptions about how I play the game because that's also downright insulting, saying I didn't do something when you don't know if I did or not, even if you "thought" I didn't.