Indeed, I understand if the developers "don't feel like screwing with it", and I don't even take exception or offense to it in the least.
Frankly, when I'm done with a project I more or less shelve it and that's it, so I can relate in that way to developers who don't want external calls from the community to "fix" what someone's fiddling with things has broken.
That being said, when a developer has no intention of allowing modification of one of their games, even if they express that intention, then that is their right to choose. However in that same breath, if persistent players/modders work their way into a game to change things around to their liking, the developer actively and aggressively dismantling their progress is a really despicable move.
I of course have experienced game patches that just happened to monkey with something, and all it needed was a slight tweak to get back to where you were, so there was very likely no intentional detriment to players/modders there, but on the other hand Empire: Total War for instance had multiple patches released specifically to stop modders from modding in the "extra units" that were supposed to be exclusive to special editions of the game.
I don't begrudge anyone that has a collector's edition or whathaveyou that has a special do-dad in it, but if the actual gizmo is contained within every single copy of the game ever made, and all a player has to do is open a SINGLE FILE and change a ZERO to a ONE, in order to enable that unit, frankly that is an epic level "charlie foxtrot" on the part of the developer, not any failing of the modder to discover such a simple and flimsy wall.
So what did every player with even the slightest ability to mod do with their fresh new copy of Empire: Total War? Well a HUGE portion of them enabled the special/bonus units. SEGA of course didn't like that at all, because it didn't get them as much money and basically made everyone's game into a collector's edition with pre-order bonuses from every store at once...
If they had intended that exclusivity to be enforceable, they shouldn't have made it "on-disk DLC".
Anyway, when SEGA had enough of their own debacle, they patched up the game to disable such modding, and then just as soon as they could they simply abandoned Empire:TW anyway for Napoleon:TW, more or less leaving Empire unfinished.