Okay, stay with me here but sometimes I feel like life is just like when someone gives you a super rare, and super expensive tropical fish for a present when you didn't even ask for it.
Now you own that fish, and it's your responsibility to make sure it has a good life and gets fed even though its food isn't cheap and you're not even super sure what it actually eats. But you can't just give the fish back so now you have to pour all your money into something you didn't even want in the first place.
Plus the fish doesn't even do anything worthwhile that would make you feel like it's not actually such a bad pet.