
I'm in disagreement with everyone that says this is a horrible weakness. Whenever I draw this card I actually feel lucky I didn't get something worse. To understand why, just imagine this scenario:
You are Daisy and you are engaged with a powerful monster, you can kill it with your trusty shriveling and higher education, but you only have 1 action left and you cannot afford to take another hit. You decide to evade the monster so you can kill it the very next round. You succeed, but you had to commit more cards than you wished to. Now you have four cards left. No big deal, or so you think, after all the upkeep phase is coming and you'll get your fifth card. You draw a card and it is a basic weakness...
Now the next round begins, having a weakness in this situation is already bad as it is, but there is another very bad effect of having drawn a weakness. Something that whoever thinks "Indebted" is awful is probably missing. You were robbed of the chance of getting a useful card. Now you have no way to use higher education to boost your willpower, you will not be able effectively attack the monster successfully. You will be defeated and you will lose the scenario.
A basic weakness in your deck doesn't simply do whatever it is written on its revelation effect, it also robs you of the chance of getting a useful card. You spent an action to draw a card, but you got a weakness? Your action was wasted. You just used overpower and perception, but when you draw a card you get a weakness? What was meant to be a reward became a punishment.
It is true, unlike other weaknesses indebted will always hurt you. But there are two things that indebted will never do. It will never haunt you at a most critical time, and it will never rob you of a chance of getting a useful card.
If you were given the choice to get a consistent mild evil or something that inconsistently swings between neutral to devastating, what would you choose? If you choose the latter I can only say I envy you for feeling that lucky, I sure don't.