Thanks to industrial grade food production meat cows and dairy cows are two entirely separate breeds by now. Old school cows you were able to butcher once they died of old age or whatever and get a decent cut of meta out of that. Modern cows are bred to either produce more milk or to produce more meat. Which on one end results in cows too thin to be butcherable and on the other end results in cows with too little nutrients in their body to produce any excess milk.
I say we go back to the old ways of mixed use cows and live with the reduced milk and meat output. What most people drink might as well be colored water given all the fat gets filtered out of the milk so switching to an alternative shouldn’t be a problem (aside from getting used to not drinking cow milk and instead whatever milk is to their liking)