They ARE pushing the limit here, and he's right to call that out. Yes, there's some margin in Celestion's rating. But you just know if Celestion could have honestly called it a 25w speaker they would have for this very reason - their customers were going to want to make 100w cabs. There is not some engineering magic at Fender HQ that increases the power handling of the speakers. There's just marketing deciding to add 5w because it comes out round.
We're all big boys here, presumably with big boy wallets to match. If you want to buy a slightly underpowered cab, then you just have to pay up if and when a speaker blows. Nothing wrong with that. It's sort of like tires on a sports car - they're a wear item, suck it up. Conversely if you want a cab with more power handling, either with or without the 12M sound, there's options. Personally I like the 12M sound but I'm not going to buy a 100w head only to run it through 96dBSPL/1w/1m speakers. I want the big venue firepower if I need it. So I use V30s or other options and that's what I would recommend. Marshall never really trusted 2xGB with a 50w or 4xGB with a 100w, and I think they were right not to.
If you keep your stage volume in the 100-105dB or below range, they'll be perfectly safe.