My simple argument for circumcision, as a man (and a father):

It's a better looking peener. Study after study (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523040/) show that women like the aesthetics more.

When it came time to make that choice for my son, my simple logic was, "who am I to deny my son a chance at a BJ?"

No Regerts.

Plus, a casual perusal of adult shops shows that realistic dildos are all circumcised.

Or horses. Or tentacles. You get the point.