Maybe because it's your bank and you're likely to at least moderately trust the bank you choose? But also, more generally, because it says a lot of things, maybe things you're not conscious of, but it still says them. Off the top of my head:

1) "I manage to survive with this crappy of a design, so I must be doing something else right."

2) "I don't track you all that much. I just get out of the way and let you do stuff."

3) "I don't invest as much time in marketing, I invest time in getting stuff done"