I’ve seen this instruction when adding parts with pre-wired connections. I assumed it was because the wires were stranded and possibly CCA (aluminum) and a smaller diameter than 14-gauge, and so wouldn’t make a reliable connection with a wire nut and too brittle to crimp.
Otherwise I would guess that they’re worried about vibration shaking the connection loose, and the WAGO clamping pressure was determined to be better than the spring in a wire nut. But crimping would be best in this case, so ???
For those concerned (or hopeful) about vast hordes of topless Minnesota women roaming the streets: They made boobs legal in Ontario in the mid 90’s and I’ve NEVER seen any women go topless in public. I’m sure it happens, but it’s extremely rare. Heck, most guys still swim in t-shirts up here.
The point of the law in Canada was to make a point that if men and women are to be equal, the law should reflect that. Of course in the US it’s about sex and not equality.