I am a pre-washer about 90% of the time. I don't pre-wash bolts or precuts, and if I'm using a trusted fabric yardage with unwashed precuts I often won't pre-wash the yardage either.
BUT, it is a pain and I do NOT enjoy the process. Right now I have a backlog of fabric waiting to be washed. Probably at least 3 loads worth. Bleh. But I'm really glad it's done when I go to make a quilt.
I used to also press my fabric after washing it but now I don't. I have to press right before I cut anyway due to folding creases so I stopped pre-ironing too.