Yea, things like that happen far to often. It's because DMing is an ART. It's about applying the right technique at the right time. Better DM's are better because they have mastered that ART.
If it's something the PC's must find then don't have them check to find it, or if you do make failure be a success with a setback.
I agree with this absolutely and I myself font adhere to the stated positions on the meaningful consequence "style".
To me, the poles me in the eye most likely "lack of ARTistry" in the GMs art shown there is the "must find" part.
A general goal or expression of "'term of art" I use is what I call "The Three R's" (which, unlike the more traditional use of this term, mine all actually start with R)
A scenario and encounter of any non-trivial nature worth of its screen-time has to be Robust, Reactive and Resilient.
Robust means its offers up a variety of options and objectives - not just one way to get one thing. If it's not robust, waste little or no time there,
Reactive means it will see its nature and circumstances change depending on what is happening and what the PCs are doing.
Resilient means every outcome leads somewhere and you are fine if that happens.