I think it’s probably a limited market, honestly, unless it’s cheaper. The cow still only produces milk to an efficient level for about five years; after that you kill it. People concerned with the ethical issues won’t want it, generally; they’d continue to use either plant ‘milk’ or just no milk.
And the startup costs would be high; getting it approved for human consumption would not be cheap, and there’d be a risk of it being barred on animal welfare grounds anyway. Notably, the reason, at least officially, that hormones can’t be used on farm animals in the EU is animal welfare, not safety (you could speculate that it’s actually about safety, but animal welfare is an easier one for governments to win on).
Ultimately you’d be looking at a high risk of never getting it approved, and even if you did it’s unclear who’d want it.
And the startup costs would be high; getting it approved for human consumption would not be cheap, and there’d be a risk of it being barred on animal welfare grounds anyway. Notably, the reason, at least officially, that hormones can’t be used on farm animals in the EU is animal welfare, not safety (you could speculate that it’s actually about safety, but animal welfare is an easier one for governments to win on).
Ultimately you’d be looking at a high risk of never getting it approved, and even if you did it’s unclear who’d want it.