Why is making loans to people that have, statistically, a very low chance of paying off somehow not also a "bad financial decision"? We pay for "bad financial decisions" regardless of who makes them - debt forgiveness for individuals or bank bailouts when they get in over their heads.
Banks only lend for education because it's not dischargeable - there's no penalty for the bank making a 'bad decision' because they'll get their money one way or another.
Yes, make all student debt able to be discharged in bankruptcy, and we'll see a different dynamic play out. However... there are more predatory lenders out there that specifically target the newly bankrupt so... it may not 'cure' all issues, just shift some of the burden around.
EDIT: had meant to add that we already pay for people's bad health decisions via insurance pools, and we already pay for people's bad life decisions via prisons.