Pepper spray is much easier to obtain than a gun? I dunno... I think guns are pretty easy to obtain in Wisconsin.
WI always got bashed for no concealed carry, but, really, the rest of its gun laws, or should I say lack of them, is good stuff and puts various other states to shame.
A gun is obviously much better at stopping a threat than pepper spray, (assuming both are used correctly), but, also, some people simply aren't comfortable with guns or the thought of using a gun on another person, even if their own life is in danger, so pepper spray is still better than harsh words.
Far as I know, you could already conceal carry pepper spray for the last 10 years or so. You can of course certainly open carry it, but that has always applied to guns too.
The new law now allows stun guns as well. I've seen those literally take someone's legs out from under them. But pepper spray is arguably better for most people imo.