I don't think this is good for men or for women. There could possibly be an extremely small percentage of people who actually would benefit from living a life like that, but the extreme majority of people who choose to live like that are not really meant to be doing that and do not have good results.
Something like this was done in Germany after WWI, only because such an extreme percentage of the population was killed in the war, so they were desperate to have as many children as possible within one generation to repair their population size. And the way to physically create the largest number of children as quickly as possible is for one man to impregnate multiple women. In most cases, this was harmful emotionally or psychologically for most people involved because most people are naturally meant to be monogamous. But this was done for desperare reasons.