Most meat eaters base it on closeness to said living thing.
It'll be interesting to see if the veganism movement survives lab grown meat that is ethically produced.
It would be like how Ozempic lead to a mysterious quieting of Body Positivity/Health at Every Size advocates. They were a vocal minority, there was much "debate" and cri de couer from many sides and now its all evaporated without a farewell or explicit winding down.
Were lab grown meat to be available today at a cost lower than regular meat, it is apparent that there would still be huge amounts of animal ag dollars spent on lobbying against and demonizing these things, and millions of people who would fall for the propaganda.
You can compare this to renewables now, even though they may be far cheaper per kwH, and the Trump admin's push to halt all renewable projects and do everything they can to prop up the viability of fossil fuels.
This means the vegan movement would need to continue to exist as does the environmental movement.
[0] https://www.cbsnews.com/miami/news/federal-appeals-court-uph...