It's easier to hit what you intend to hit with the Toe than it is with a Glock.
When you make a mistake with the Toe, the magnitude of that mistake is less than when you make the identical mistake on the Glock.
Accuracy matters with handguns and I can absolutely see the appeal of a handgun that is easier to get the hits with. The Glock is a decent utilitarian piece of gear that works fairly well, but the ergonomics of it suck donkey water. Gaston might be many things, but an ergonomic genius ain't one of them. The Glock is ergonomic in the same way that the 1967-1970 Charger and the C2 Corvette are "aerodynamic".
The mechanical accuracy has most definitely improved in the Gen5 guns, but the grip of the gun still sucks for most hands and people are working around the gun more than having it work with them.
The Glock has been an LE standard for the last 20 years, even if it didn't really work all that well in .40 caliber versions. 15-20 years is about how long it takes for old ideas to become new again, so we're right on time for 1911's to come back hard and heavy because they are a lot easier to shoot. And now with a red dot on top of the slide people have an actual coach explaining to them what they've been doing wrong and it lets them be more accurate even if they aren't always sure exactly why. That further reenforces the desire for guns that are easier to shoot.
Thus the P320, the Walther duty guns, etc...really, really nice triggers. Probably a little
too nice for duty use without a manual safety, but whatevs.
Glock has no interest in changing because they're selling every pistol they make at obscene levels of profit. What changes they've made have been minimal and reluctant because "perfection", except they're not, never have been, and never will be. Never buy your own advertising.
So why not just buy a Glock? Because they're harder to work with than they have to be.
Why not buy something like, say, an M&P instead?
I did. It's great. I was just helping a buddy get his M&P 2.0 compact sighted in with his new Acro P2 yesterday. Apex trigger, but that's the only modification to the gun. It had no trouble holding X and 10 at 25 yards if you do your part on the trigger.
Great guns. Without the Apex trigger in it, it's more difficult to claim those X's. But 10 ring is still easily doable.
When I make mistakes with the M&P, they're significantly closer to my intended point of aim than when I made mistakes with my Glocks. All because the grip actually works with my hands.
The Glock is a decent tool, but it's one a lot of folks have to fight with to get the results they want. I'm not surprised that people are looking elsewhere.