Consumers.
You can't stop murder simply by waiting for anti-murder people to stop murdering.
And I would argue consumers have a very big impact on how industry acts. There are a number of environmentally friend products offered that are regulatory requirements at all.
https://www.menshealth.com/nutrition/a20950388/cockroach-mil...
Oddly though, ground beef and chicken are the two substances that are the easiest to replace. There's almost nothing that doesn't taste a little like chicken once properly prepared. Similarly, there are plenty of ground up things that can substitute for ground beef. Then you can go into cost and life cycle. The cost of chicken is lower because of cycle cycle. The cost of ground beef is lower because it's low quality.
I'm fairly certain it's not the ground beef and chicken industry that are holding up the meat industry on the whole.
In this case you should spend more money on less meat. Just saying 'spend less money' continues to ignore the enternatilies that make meat production such a driver of climate change.