"easy to get" that's because it's fairly cheap. 6300 IP to get a champion via the free route. Whatever sources I'm finding (because I don't personallly play LoL) finding it takes around 2 weeks, or 20 hours of gameplay to save up that much. 20 hours of earning gralats in Era can also get you a decently priced gun. Also, $70 gets you a number of champions in LoL, while in Era you can also get multiple cheaper guns. But, everyone here decides to put all their eggs in one basket, the BAR, and it got nerfed. As previously stated, no one forced players to spend so much on a BAR. They could have gone with other, more balanced guns that are less likely to get nerfed.
Also, LoL is a better example of a well balanced game. New champions attempt to bring to the game things that previously weren't available and the constant patches are in order to maintain balance and variety within the game. If it was more imbalanced, you'd see the same 5 champions get picked every single time (like we have the BAR, and some other high priced options) and players without that specific team would lose majority of the time being too weak for the overpowered ones.
I feel like if this were put into effect, there'd be cries from many players and we'd be like the parents that are saying "trust us, it's good for you"But seriously, this argument is hard to counter. Sure, people would be unhappy that guns were nerfed in general, but at the end of the day, their expensive guns are still stronger than the cheaper ones. It's a simple way to counter the buildup of spam on the server, as well as promote skill a little more with freeze becoming a noteworthy stat once again.