There are two types of people in the world: rooster lovers and rooster haters. You will get responses to your question from both camps...
However, roosters CAN stress out hens which adversely effects laying production. Too many roosters for the number of hens, for example, causes "over-mating" which can really stress out a hen or few. Plus there's the feather loss on their backs from too many or a too rough rooster treading their backs.
But a well-balanced flock usually doesn't experience those problems.
If you don't like fertilized eggs, you won't want a rooster. (If so, there's also something odd about your beliefs because there is NO difference in taste or nutrition between fertile or non-fertilized eggs.)
If you don't want chicks, you have to gather eggs - even from broody hens. It's not necessary to deny yourself the pleasure of having a rooster in your flock. But someone might try to tell you so.
A rooster stops hen squabbles. He keeps his eye out for danger and warns them with a danger call, followed up by the all clear call when its safe. He searches out treats for them to eat, approves of their nest choices or even shows 'em good places to lay their eggs.
Why would anyone NOT roo?
Yah, I know the reasons, trust me. I am just not one of those people. I love roosters. Get yerself a new roo!