Mabinogi is a game that rewards you for going above and beyond. You do not have to rank life skills to be relevant. You could do all the content in the game without touching a single life skill.
Doesn't it make sense to reward the players that take the time to grind out life skills as they are now? Not everything has to be easy. Some things are time consuming. Let the players that take the time to grind out life skills be rewarded and feel accomplished.
You know, the whole "Feel rewarded and accomplished" thing was also said by a certain company (who shall not be named) about the infamous SWBF2... and it had the exact same issue our life skills do. The payoff of ranking life skills at their current requirements is many times, not worth it unless you're going for something specific, have literally nothing else to rank, or you want to be a half decent archer that doesn't take forever to kill anything compared to even alchemists. Sure, maybe instead of straight up halving the requirements to rank up isn't the right answer (though, that was more of a starter and not a final thing), but a rework at the very least is. Hell, I'm sure most anyone would be plenty satisfied if the "Fail X" wasn't part of the requirements (Why TF is that even a req? Why would failing something if you know how to do it correctly help you in ANY way?) as anyone that wants to play the game instead of grinding through life skills at the very start will usually have too much dex to fail at all.
Now, thank god for the fact that we have fail potions, otherwise anyone that's over current 200 would be totally screwed (though what is it, 60 or 70k for 5 minutes? Seems way overpriced for what you get, almost as punishment for not daring to rank life skills first and foremost). But the issue is that we shouldn't need fail potions just to progress in the game, that's literal punishment for not doing something the way the devs wanted you to... in a game that says you can do what you want when you want. Seeing the issue here?
No one is really asking to make life skills EASY to rank, just not make it as blatant time padding as it obviously is.