Words matter but the phrase "work spouse" is only disrespectful is you choose to take it that way. It is benign. I work with people who are of opposite genders, have work spouses, AND are married. Quit projecting your own sensibilities onto others. It's tiring, to say the least. They are far more important issues to worry about, like climate change, income inequality, lack of free healthcare, etc. But no, you want to die on the hill of the term "work spouse." It demonstrates how unserious you are as a person when it come to social and economic justice. You simply can't be taken seriously.