Nature equipped woman with breasts and humankind with the ability to invent useful tools, one of which is an alternative method of administering milk feeds.
The dinner argument is bogus. He can do both if he wants and is given the choice. Saying to someone "no, you can't do what you want because you will have to be doing this other, entirely unrelated job for me at a completely different time" makes no sense.
Yes, he can do other things. But he can also do feeding if he's let.
Luckily I didn't find expressing that difficult, because we had a lot of early trouble with latch. It was a week or so before we managed feeding from the breast, so if it hadn't been possible I would have had to give formula while my supply dwindled.
You don't know in advance how it's going to go. Taking strong positions on expressing being a faff before you've ever done it is ridiculous. Apart from it being the thing that made breastfeeding possible for me, I also found it easy, convenient and it gave me flexibility I was thankful for.
Maybe the OP won't be able to express, maybe she won't be arsed, maybe she'll have to.
Saying "let's see" (and meaning it) is a lot more reasonable, realistic and kind than taking an ideological opposition to bottle feeding and using it as an excuse to exclude your partner from feeds.
For the first week of DD1's life her father did all her feeds. With a spoon. Or a syringe. Sometimes a cup. I did only (initially abortive attempts at) breastfeeding. I wonder how that would have worked if I had told him before she was born that I found the thought of him feeding her sickening?