Quoting Kelly&Coralie:" A. itll take you twice as long to feed kid B. A pump doesn't get milk out like a baby will C. Most ... [snip!] ... the clock, even if your kid isn't hungry, to pump I commend you if you can do it, but it makes life so so so much harder"
This! I know a woman locally who has exclusively pumped for almost a year due to her son's health issues (he phsyically can't nurse) But she has to nurse every 2-3 hours for 45 mins a time around the clock just to meet his needs (nothing left for extra) and still uses donated BM from time to time if she's short. Per her---it's lots and lots of extra work--actual nursing is much less hassle.