Frankly, I find it demeaning/patronizing to define a person a Bridezilla just because she is not satisfied with a service a vendor provides. Because weddings are often big productions, averaging $30,000 or more, it's only normal for a bride to
want not just value for her wedding but exactly what she wants.
I also find it extremely unprofessional for wedding pros to say "don't focus on details, something WILL go wrong". Try to go to a surgeon and see how you like it when he says "don't worry, it won't be perfect! For sure, something will go wrong".
Alternatively, try buying a car, not getting the color or interiors or accessories you wanted for that price and see if the salesman dares calling you a client-zilla. They do not. And they do not because they are professionals.
As a wedding planner and a bride-to-be I can attest that it is extremely hard to find a wedding pro who doesn't try to railroad your wedding into something you don't want. It's also extremely hard to find a wedding planner who knows how to
properly deliver what the bride asked for. That's why they usually are underpaid and poorly regarded.
As wedding pros, we can either blame it on the bride OR take responsibility and improve the profession. I side with the latter, what you about YOU?