Good points on the ink jet. I’m not sure laser printers are really toxic. Yes 30-40 years ago there were problems with ozone for heavy printing environments, or if you sat right next to the printer. But AFAIK the ozone levels have been reduced, and for small printers it’s not a problem. While ozone is toxic, it is also naturally occurring, and we can tolerate low levels of it.
Regarding chemicals in the toner, it was a problem way way back, because in high volume environments that shit sometimes would be all over the place. Because containers weren’t tight enough. I don’t recall seeing toner in or around laser printers for home office for the past 2 decades. I’m guessing production environments have improved similarly too, but I haven’t been much in contact with those lately.
There are clear work environment regulations in most (western) countries, that date back to the early 80’s and even earlier. As a minimum those regulations must be met. So yes there are actually health and safety laws around laser printers. And AFAIK they are completely safe unless you are doing something illegal or incredibly stupid.