Everything becomes another tool of manipulation. "My love language is 'acts of service', so if you don't take out the trash, you don't love me." That's just straight up emotional manipulation.

Whereas it should be "My husband prepares my coffee and oats every morning. This is how he shows he loves me."

In the first, it's all about how one can use a concept to get what you want. In the second, it's about recognizing what's already being given and what it means.

There should be a rule, where you can learn about this and other concepts, but you are never allowed to talk about it with people you have a relationship with.