Ah yes... those two posts where you called it quote-unquote rubbish.The problem with ES system already well explained.
I'm not seeing your issue. Skyrim you leveled up by increasing skills, 10 skill increases to one level increase and at the level you could increase one of three core attributes (health, magic, stamina). To increase a skill you had to actively use that skill and the returns were already diminishing so the amount of sneaking to get your first skill increase was not equal or even close to your last. So yes, you could, in theory, do what my buddy did freshmen year of college for Oblivion and build a lego robot that pulled the trigger of his Xbox controller 24/7 which made his character cast a basic heal spell so he could grind that skill... but I would point out that he built and programmed a robot so... I'm not really seeing this as an exploit.
Plus in Skyrim this was balanced out because the XP earned toward skills like heal and conjuration required you to actually do damage or heal damage. You couldn't just game the system like my buddy did in university.
And you've failed to address the fairness is the KOTOR system where I can level up skills that I've never used with the intent to break the game later. Know that a major campaign point requires X diplomacy, don't bother using diplomacy, just level up and spend your skill points where you need to. This is a flaw with most table-top games (games that I love anyway). You get the XP and you can spend it on anything you want. Want to learn three languages in the course of a single night? Done. Want to learn how to do amazing flips while killing loads of baddies? Done. No need to actually train those abilities. No need to actually work for them. Just spend points. Done. No questions asked.
And in games like Kotor, D&D, and Pathfinder this leads to power builds. Since everyone levels essentially exactly the same all you need to do is order off the menu just like the guide says. Grind until you're level five, dump skill points in X, Y, and Z, and you've got the most efficient build. At least in Skyrim you have to pay lip service to the skills you want to grind.