I was the same as you! I gave my LO FM before sleep so she can sleep longer before waking up for next feed, which means I get to sleep longer too. I don’t pump in the wee hours as well, I find it taxing and mentally draining. For me, it’s simple. Night is for sleep, day is for work. Night feeds are definitely unavoidable when baby is born but sleep when baby is asleep. Who the heck cares how much less or more sleep mothers are getting? This isn’t a competition, are you the better mother with less sleep? Are you the better mother who pumps in the wee hours? Are you the better mother who gets to sleep all night without waking up? No right? All mothers are different. Our lifestyles are different and so are our schedules and body clocks.
In my opinion, the person who said that to you IS THE SELFISH ONE.