I really hate whenever I try to explain how some bad rules can be abused and immediatelly get someone say shit like "If this happens in your group, change it" as if that would solve the problem. And whenever it is not soemthing you witnessed personally, then it means it never happens and could never happen.
Not really. You're placing blame on players using a system as written and a DM for being unable to handle an exploit in the rules. At no point do you open the rules themselves up for criticism. In fact, you deflect all criticism away from the rules, as if the impossibility of a perfect system excuses every bad decision ever made.
Just like how there is no ruleset that cannot be exploited, there is no ruleset that cannot be improved. It's only by acknowledging the flaws that something can improve, but you seem hellbent on dismissing flaws entirely. That's unhealthy.
DnD isn't just a set of rules, though. It is inherently a social activity, and that means there has to be a certain level of expectation for social norms. If your group has toxic people in it, they will be toxic while playing tic-tac-toe.
The solution is to employ social pressure or ostracism for those people. We can certainly modify rules that have proven abusive in the past, but enforcing rules of conduct must always be the first line of defense.
If D&D isn't a set of rules, why do they charge so much for their rulebook?
It's also worth noting that nobody has said an actual exploit. Nobody has DONE anything toxic. Someone just noticed a POTENTIAL exploit and suggested fixing it before any problems occur. Yet ostracizing people is a more acceptable position than a rules patch?
If the rules aren't something to be changed, why do they charge so much for the rules revision they just put out?
At its core DnD is a wargame where we spend most of the game time fighting against monsters and bad guys. Having robust combat systems is the big draw of the game and fighting monsters in interesting ways without being too unfair either way. People want rules that are robust enough to make interesting combat but don't completely break down under a bit of the box thinking, like the peasant rail gun, or the moon box lich, or the create water in someone's lungs to cause drowning, or the coffeelock to get infinite spell slots.
All of these mechanical oversights are frustrating to play with because we have to stop the game and debate over whether this cheesy game breaking bullshit should be allowed at the table and it takes time away from the reason we're all here, to get together play a game, and let everyone have fun, DM included. And sitting around debating whether the moon counts as a container for a lich's soul reliquary or lining up 500 peasants and each of them readying and handing off an object at a bazillion mph for an hour and a half breaks the rules is not fun.
You want a system for magic that encourages being busted even at high levels? Play some Mage the Ascension, you can do some absurdly wacky shit even at fairly low power levels.