you understand vetos are something congress can override right?

Vetoing the bill would have at least made the passage more notable, and likely required there to have been more than thirty seconds of debate on the topic. Making them override a veto has some value.

again it's not a partisan issue... literally both parties are passing these bills almost unanimously. it's a class issue i'll give you but not a partisan one.

Vetoing sends a message and as others have said would at least force the media to talk about it.