While technically correct (and I recognize you are quoting someone else - it's not your statement), I suspect many people have been deceived by this statement. Bear spray requires less training, not no training - less skill, not no skill.
When my daughters moved out, I bought each of them defensive pepper spray. They each used the same spray multiple times, going through a full Sabre before leaving home and another full one over the course of the next year (and not using the one they actually carried). That's a whole lot less training that the well over 1,000 rounds each of my kids had with a firearm, but it's also a whole lot more training than most people with pepper spray or with bear spray ever get.
Bear spray is expensive, but I'd rather buy two than have to read (or even think about) the instructions before using it in an emergency. I have come very close to using it twice. Each time, I was relieved when the situation resolved to realize that I knew what to do. Each time (probably not coincidence), I was downwind of the bear so I would have been spraying into the wind. I suspect the mamma and cub brown bears would have run away if they had smelled me; the Grizzly I don't know about, but he moved off slowly just before getting too close. Also, when traveling with bear spray, if I don't have a close friend to give it to, I use it before flying home - training.
A squeeze bottle of ammonia works as well on urban predators, provided you practice.