if I don't get to use a music stand of some sort on stage the I won't get most of my gigs. Whether I'm playing violin, guitar, bass, or singing, I often am a hired hand so clearly need music or lyrics or some kind of song structure guide or at least a set list, and I'm blind as a frickin bat so need it in big bold black on white print, or better yet on an ipad or equivalent.
I also get paid because I can sight read music of various types, often without a previous run through. So there are pros/cons to music stands for sure.
However if I'm playing with my own original band then it's pretty highly unlikely I'll have a music stand unless I'm the singer as well since I'm completely unable to remember lyrics, ever, under any circumstances.
I will never forget performing space oddity as singer/guitarist with the otherwise progressive pop/rock band I was bassist with back in the early 90s in a large club. I forgot the words. to space oddity. holy moly. we had 2 female backup singers. audience was right there looking at me.
Sometimes I hate my brain.
anyhow, music stand or I won't sing. American Idol judges wouldn't have let me even try out with their rules LoL