I'm not saying that. You are arguing with yourself.
Just to make sure you know, I certainly advise being on a good mineral PROGRAM.
And of course, good nutrition is of utmost importance. We've done hay sampling,
grass sampling, water sampling for customers for years. We did NOT feed alfalfa hay because we didn't have it We fed only straight grass hay and no cake and no lick tubs. Our herd health was great and our cows had 85-90% breed back in the first heat cycle. I'm talking for years...so if you want to argue with that, go ahead. If you want to feed straight alfalfa, go ahead.
BTW, where are you located? Your profile doesn't say.