Just posting this image of the difference between mens and womens breast tissue again
Right, which was my point about comparisons other female mammals - they're going to have something far closer to the image on the right than the image on the left is.
I'd swear some people have a very fuzzy concept of what drugs can do.
Yes, you can give cross-sex hormones, and they can produce very simple effects like "engorge clitoris so it looks vaguely like a small penis" or "expand breast tissue to produce rather tubular breasts" or "increase hair growth" or "thicken vocal cord".
None of those are remotely in the realm of precision we're looking for with "start producing something actually good for babies to feed on".
We can slightly bend the body's behaviour - effectively inducing a disease. But we can't make it just do something new that it fundamentally doesn't already have the capability to do.
A drug to make a male produce milk at the minute seems as far-fetched as a drug to make a male grow an extra arm.
Sure, you can make a male produce some liquid, as I'm sure you could make a male grow some extra tissue. But we need something a bit more specific than "something coming out of the nipples".
Now, maybe it is possible, and there's a complete hidden milk production factory in there, but if so, I would have expected someone to have actually demonstrated it by now. But all I'm seeing is attempted diversions.