let his family live and instead have written a story about living in diasporas
Given that Discovery had plenty of Afrofuturism themes at this point in the story, this really seems like an obvious go-to for where to go next. Booker's homeworld wasn't perfect, but it was more perfect than anything else going at the time; losing it was a tragedy that really needed a better epilogue. Rebuilding that place, or helping his people find a new home (probably with the Trills), is a very compelling arc and would have seen the character come unto their own. We really should have seen Booker find a place among the Federation delegates by the end of the series.
If you don't change the menu, but substitute processed products for meat, then it very much is more expensive. If you change what you're eating entirely, and go after the no/low processed route, you can do pretty well.
Having cut a bunch of things out of my diet due to food sensitivities, I routinely see people struggle to imagine what dining looks like for me. A lot of folks have a very fixed view of cuisine and the day-to-day of making meals at home. All I had to do was eat less "American" food and more "East Asian" food; suggesting this makes some heads explode. IMO, a lot of people are not prepared to change that much, and will conjure any plausible excuse to avoid that struggle.