Of the vegans I know in real life, none take such a hard-line approach with respect to products such as vaccines that were initially cultured with animal tissue, or even tested on animals. [1] I assume cultured meat would fall into a similar category, though they might avoid it for other reasons. When we discussed it, most of them also do not object to native peoples hunting wild animals or judge people who consume animal products in places (e.g. above the arctic circle) where a vegan diet is cost-prohibitive.

There are no doubt vegan purists who consider my friends to be "bad vegans", I'm just bringing it up to refute the notion that the vegan community is as fanatical or monolithic as some make them out to be.

[1] https://www.peta.org.uk/blog/vegans-covid-19-vaccine/