I should say that this is only one reason.
It's not a great article, & they really did crap research as to options, but the general gist is spot on.
http://www.racked.com/2016/11/.....ng-so-hard

Honestly what torques me most is that mainly the options are online only. Even the mall stores that have bigger sizes, it's only online.
I attended a wedding in October. I went to the downtown Nordstrom, in the entire store my sales associate & I found one ok dress, and one that did actually work (see find). She said if I had given her more notice she could have ordered something. Unfortunately I couldn't plan ahead this time.
I did also look at Macys, but the selection was far from inspiring.