As Bimble says, you can shoot without one.
When an archer starts with a compound as their first bow, the peep can be a distraction. During the early learning stages of shooting a compound, it is important to get used to the shot process of drawing to a solid anchor on the face; getting a good aim with the front sight; and not having to delay while the eye settles into the peep. Sometimes the peep turns in the last part of the draw and that is a real put off. Sometimes the peep is not well positioned and the temptation is to move the draw hand to get a good view through the peep or move the head to get a nice clean view.
However, if you have made a good start without one, it is a good idea to try a peep for the benefits it brings. Some front sights with a lens need a peep to bring the target into better focus.
I shoot with no peep. Mainly because my right eye is damaged and I have a sight in front of my left eye. A peep in front of my right eye just makes a mess of what I see at full draw.
Recurve archers can easily out shoot me, and they manage without a peep. My aiming system is about the same as theirs so I should be better, in theory. I have a lot of let off and a release aid to help.