Some people have small joints and their wrists don't/can't support much weight. In that case not wearing wrist wraps is more trouble than it's worth. If you're only benching like <315 then I would say try to manage without them by strengthening wrists and squeezing the bar as hard as you can during pressing but there will come a point where your wrists aren't getting any stronger and the discomfort or pain is just hindering your performance. It's your call and not really a big deal...