This seems no different than the ridiculous laws proposed in some US states recently that would ban EV sales to protect the oil and gas industries. I’m sorry that people could one day lose jobs over this, but if lab-grown meat is proven to be a safe and cost/energy/carbon efficient alternative to raising and killing animals, then it would be insane to not pursue that.
We could have equally banned internal combustion engines to protect the steam engine and buggy whip industries or phase change refrigeration to protect the jobs of the ice delivery companies.
https://en.wikipedia.org/wiki/Red_flag_traffic_laws
These laws didn't last long, fortunately, and ostensibly they were to protect cattle, horses and carriage riders but clearly the idea was to slow the car down to the speed of a pedestrian effectively hobbling it to the point that driving a car didn't make sense.