> An engineer's job is to add the features that management asks to be added.

I get the context here (you are talking about software engineers, fine, and adding silly chat features, which is pretty low stakes). But, still, want to mention the general case:

The engineer’s professional obligation is to push back against the company if they are asked to design something impossible (and try to find some alternative that fits the customer’s business need if that’s possible), and to refuse or possible whistle-blow if asked to do something unethical/harmful to society.

We live in a very corporatized society where professions are being turned into jobs left and right. But, the engineer’s job is to just implement management’s requests in the same way that the doctor just exists as a conduit to your insurance company: that’s the way the company would like it.