There's some truth to this. Some uncircumcised men don't wash properly.
Kind of like shaving your head to avoid having to washing your hair.
If you are Muslim or Jewish, you really don't have a choice.
Thi is kind of a no win argument because if you are circumcised it's not like you can say 'that was dumb' and grow it back - and - if you have made it this far au natural and your dick has not fallen off, there's nothing to gain snipping it off now .. unless you are changing religions.