No..... most people keep roosters for chicks and for protection. If your hens spend most of the time in the coop/run, the need for protection is much less. In that case, a head hen is probably enough.
But if you free range, then a good rooster will give more protection than a hen. They are much taller and can see farther, and they pay more attention. They keep the flock together. When I have a good rooster, I have none to almost none day time predator losses, without a good roo, I have lost many a hen over the years in broad daylight.
I do have hens that are more aware, and those are seldom eaten by a predator, but they do nothing for the less aware hens in the flock. It is more of each to her own.
Mrs K