Trying to regulate one factor in a multivariate problem as a universal panacea, is the quickest way to cause an epidemic.
Why are there trans fats? Becasue in the 90s we declared all cholesterol was bad for you, so all fully hydrogenated oils were removed. Next we knew butter and olive oil turns rancid more quickly than the trans fats.
Next, count on more food spoilage due to rancid prepared food products.
I ate transfats for decades and still don’t have any way of knowing if they harmed me or not. The human body has marvelous ways of compensating for otherwise troublesome factors, and it isn’t designed to last forever either.
There are low levels of trans fats even in nature. True, as you point out, most of the trans fat we get in modern foods comes from hydrogenation. There are alternative processes like interesterification. And it may prove possible to create better hydrogenation processes that produce less trans fat. The devil is in the details but as is our modern wont, someone just took it on themselves to officiously damn the whole thing.