I frankly have no issue forgiving a chunk of debt no matter where they went to school. Every cent of that debt forgiven is something they'll spend on something else instead, which then pays actual people working in actual jobs and industries instead of paying off a handful of loan sharks so they can repeat the cycle.
I'm disappointed by Biden's line on this, but it's possible that 1) he changes his mind (he's been president for a... day short of a month now) and 2) this puts it in the political narrative regardless.
And, of course, it beats whatever Trump would do about it, which would most optimistically be "nothing" and, at its worst, would be "actively make the problem worse in an effort to enrich himself"