Ask HN: What benefit would a Senior SWE receive from a masters in CS?

My father keeps trying to get me to take online graduate degree classes in computer science. I don’t have an undergraduate CS degree, but haven’t felt like I was missing anything, technically speaking, for a really long time. Every time my dad brings it up, I tell him I wouldn’t get any benefit from doing it. But is that true? What benefits could I receive from a new, expensive degree?