Of course we are probably doing exactly what the contrarian doofus wants us to do by burrowing down a different rabbit hole, but at the risk of that I'll just say you could say the same thing for lots of debt or programs. Forgiving credit card debt would free up people to spend on other things and lots of small business owners use credit cards to get their businesses off the ground. Funding child care would free up money and unlock additional productive workforce. There are multiples of examples and many of those don't also come with the problem that the average college graduate has more earning potential than a non-graduate, so it's regressive in that sense. It's been a while since I've checked these figures, but the average and median monthly payment on student debt in this country is something like $400, so it's not as crippling as people make it out to be for the vast majority of people. Of course there are outliers that make the news, but that's not what we should base policy on.
In a nutshell, I see some positive benefits to forgiving student debt, but no more than many other ways to spend that money and we have many higher priorities such as SS and Medicare as I mentioned before.