It's not "gun controllers bringing it up", it's manufacturers working on them. What do you have against manufacturers developing new products?
I have absolutely nothing against manufacturers developing new gun safety products and offering them on the market. The concern with these "smart" guns is that they'll be mandated by law. This has already happened in New Jersey. The 2002 Childproof Handgun Law says that three years after "smart" guns are available for sale in the US, all guns for sale in New Jersey must be "smart". The law doesn't require that the guns be in any way reliable or have obtained any significant market share, just that they've been available for sale. So if these actually make it to market people in NJ who want reliable guns are screwed. And if any other states, or Congress, passes a similar law, then all of us are screwed.
Actually, I'd have no problem with smart guns if they were really reliable. And there's a really simple reliability screening test we can use: offer them to military and law enforcement personnel. Cops in particular should see a lot of value in smart guns because cops occasionally get shot with their own guns. However, they also need their guns to be extremely reliable, and big departments and the FBI have the institutional resources and motivation to seriously test them. So, once the technology reaches a level where police are not only willing to use smart guns but actively want them then it's fine to mandate them for civilians.
Of course, thanks to the NJ law, civilians are going to fight like hell to keep these things off the shelves, which means that the years of refinement needed to make them reliable is never going to happen. Not in the US, anyway.