Yes, that's clearer.
I can only speculate that people will be told such things for image reasons or musical reasons. The latter would include the keys used, the sound required, etc. The former may be because the band leader wants a certain look.
I have no problem with either approach & getting the right gear (& shirts!) can be part of the fun of a new project.
My dear wife told me I needed to get a double bass to join her band & I'm so glad she did as the vast majority of my gigs are now on db. The learning curve was rather steeper than a move from 4 to 5 but really worthwhile.
In short, you need to decide whether these demands are relevant and a positive challenge or indicate a control freak that may be hard to tolerate going forwards.