Also, Mnippy.... I agree with Sephy. There was a point with V where I had to top up each bf with expressed milk. Bf, expressing and topping up took up almost all my time... What with DD, H (the other twin), the dog and DH away for weeks at a time, I'm not sure I could have carried on. If she were an only child, fine, but.... Thankfully, we didn't have to cross that bridge.... I doubt very much it's a question of "can't be bothered"! Other commitments are other commitments and we just "do what we gotta do" to keep everything afloat. An argument of, say, more time for going out for coffee / shopping might give pause for thought, but bit if that was keeping mum from slipping into pnd!!!
Also, generally, you just have to do what you think is best at the time... And part of being a parent is that we might regret those decisions in hindsight. But there is nothing you can do to predict that... This nothing to do with your circs Mnippy (or indeed anything to do with feeding), just my experience of motherhood generally. With DD, there is one particular choice we made re childcare that we regret, but we did what we thought was best at the time.... Which is all we could do!