Nooooooope. Trust me, I’ve had experience with this. Animal husbandry is often horrible to experience, because ‘nature’ often isn’t very effective. We turn cows loose in fields and it mostly works (there are literal lawsuits about bulls not ‘doing their duty’ because big money is involved), but horses often need a lot of supervision and help. Mares are often held in place, their tails taped together so it moves as a unit and no stray hair falls and blocks the entrance, and the whole area is cleaned to prevent infections. Stallions are super cleaned. If you’ve never seen the beans picked out of a stallion’s sheath, or had to smell them, consider yourself lucky. Then the whole shaft is washed, again to prevent infections. Then they are often guided into the final destination.

You can see for yourself a lot of ‘natural’ horse breedings gone wrong on youtube. At least one famous video shows a very valuable stallion suddenly being deprived of life by a single kick from a mare.