This article feels weirdly opposed to these things on principle, purely because it's unlikely that they'll be useful, but why the fuck does that matter ?
It's not like they're expensive, and there's literally zero downside to having them in your car. Literal worst case scenario is that they simply do nothing. And in the event that they DO become useful, as incredibly unlikely as that might be, they can be a literal life saver.
Also, you don't just have to use them if YOU get into a crash. You can use them to render aid if someone else gets in a crash, and is stuck in their vehicle and they're in acute danger (otherwise, never move crash victims, wait for the paramedics to stabilise their spine)
By their some idiotic logic they use to rail against these devices, you might as well remove lightning rods from buildings or life vests from aircraft.
Let me illustrate my point with a hypothetical:
You're stuck in a car after a Passenger side T-Bone. Your car is pinched between the guardrail and the other vehicle, so both passenger side and drivers side doors can't be opened. The passenger seat/center console has been crushed against, and mangled the seatbelt receptacle, so you're unable to unbuckle. There's a fire, spreading towards the fuel tank.
Question 1: Is it possible, however unlikely, for a person to be in this situation ?
Question 2: do you think a person in that situation has better, worse, or equal odds of survival if they, or a bystander, has a window hammer and seatbelt cutter on them ?
Question 3: Are there tools, in a similar price range, that an average joe could just as easily carry around in their car with them, which would increase the survival odds more than a regular window hammer and seatbelt cutter
In my own personal assesment, my answers to those questions are "Yes", "Significantly Better" and "I can't think of one". And that's why I have both in my car. If something that costs less than 20$ to buy, has zero downside to own/have with you, and can increase my survival odds, even if only in an extremely unlikely scenario, then personally I consider it worth buying that thing.