The developers allow modders to make and use mods, however, the developers don't support the mods or their up-keep.

Every time the game gets a new update, the mods become disabled due to being a different version from the current version, and it's up to the mod authors to update their mods to match the current version of the game.

Mods breaking on each update has NOTHING to do with how the developers feel about modders, nor is it something the developers even do on purpose.... They update the game, and the mods require an update as well.