This is PURE speculation, but I feel like this could be caused by the only people who feel comfortable getting a philosophy degree being wealthy connected people. I know a lot of people from my high school that have stereotypical "be poor forever" degrees and are doing great - but if you knew them in high school, you'd know that they had millionaire parents. All the poor kids went for safer degrees because they knew they'd need money.
To be clear: I love philosophy and think it is very valuable. But sadly it seems like something that only privileged people or the very passionate take a risk on.