Possibly. In my experience, and that is all I have to go by, most abuses are not hard to recognize when it is invisibility always on, immune to damage, damage that can't be stopped or can destroy the world. etc.The problem is that people, in general and usually in specific, are actually geniuses in storytelling but absolute pants at math. Quite often the GM can't make a judgment until several sessions have gone by that Minmaxed Character A is not built in a way to allow his player to have any fun -- and neither, obviously, can Minmaxed Character A's player!
Plus, I am probably not going to play with Minmaxed character A if he is not willing to sit down before character creation to discuss the campaign I have in mind, the power limits I envision and work to make the character fit into the game without problems (and with the understanding that I have the right to require changes if unseen problems occur).
It's better for everyone involved if the heavy lifting with numbers is done beforehand, by if-not-highly-then-at-least-paid professionals.
It's not as if professionals did not design the point based systems I mentioned. Furthermore, it's never as if the designers never mess up and leave loopholes and unbalanced material that can be abused (WOTC's Character Ops boards anyone?).