No, because if some guy applies it messily and it gets all over the bathroom, or sheds hair all over the floor, or shares the same pillow in bed, or has a girl run her hands through his hair, and they have a fucked up intersex baby (which can happen even at random), they don't even need to prove daro was the cause. All they have to do is take it to court and prove that daro COULD POSSIBLY cause those problems, and the jury will side with them and Bayer will get fucked in the *** for more than a topical hair loss treatment would even be worth it for them.
I'm sure they have medical lawyers who will tell them all this as well and they won't touch it with a ten foot pole. If I'm wrong, I'll be very surprised. Part of the reason RU was never brought to market (in addition to I'm sure this same risk) is it was not considered a high earning potential treatment. The topical hair loss treatment market is not that big.
Most guys are happy with finasteride and if not, they're ready to go bald. This is also why GSK most likely hasn't bothered to get approval for Avodart (dutasteride) in most countries for hair loss. Not even worth the money and liability for them to get the approval.
Bringing this topically for hair to the market would be insanely high risk and low reward.