Because I don't want to tip my baker.
It's been a nightmare dealing with her. Not a wake up screaming kind of nightmare, but a nightmare none-the-less. We've exchanged almost 50 e-mails and phone calls in the past two weeks (I live too far to go see her in person), and my confidence level in her ability to understand what I'm trying to describe to her design-wise is absolutely zero. So much so, that it's come down to me asking her to bake the cake and ice it in plain buttercream and skip decorating it. We'll have the florist add flowers.
If she didn't make such amazingly delicious cake, I'd have cut ties weeks ago.
I feel like she falls into the "you don't have to tip if they own their own business" rule (she's a sole proprietor). But I'm also in the less than 3 weeks out and foggy-wedding-brain stage of this, so I need some back-up on this decision.