If I joined a theatre standard pro tribute band that was earning a decent living and I had a more than passing resemblance to whoever I was being passed off as a tribute to, I could maybe understand why they may lean towards suggesting I bought the correct instrument for that role.
If I was in a common or garden pub band and someone came up to me and said I needed a red Fodera P bass because they'd heard one and it sounded nice, I'd try to politely decline the suggestion.
I don't mind at all being told how to blend in with the sound of the group I am playing with, but to have bass choice requirements placed on me by other people, based on some wacky idea they have, rather than some wacky idea that I have, well.... no.