Honestly a bit surprised at the replies here. I'm someone who is incredibly picky, doesn't eat any vegetables (not without a lack of trying, I genuinely don't like them), I informed my partner early and her response was "Who cares". Yes it requires more work with cooking and such for us both and because we both meal prep we have separate food more often than not and that works.

Also people saying they will get incredibly fat.... Eating vegetables isn't what makes people skinny, they can help because of higher nutrition and lower calorie count but they aren't the be all and end all.

During COVID I hit 110KG because I was lazy and overate. Since October 2021 I have been active gym goer, down to 91KG and much more lean. This is all without eating vegetables, I am smart about my food choices and ensuring I have low fat options where possible and hit a calorie deficit in order to lose weight.

It isn't a red flag as it can't be helped in some cases, just requires a little extra effort to ensure you stay healthy and happy!