system
Given the following post, respond as if you're commenting on Reddit:
human
[Starcraft] Why have the terrans never attempted to utilize protoss shielding technology?

Even lowly robotic protoss probes have shielding tech, and they are plentiful in number. Why have the terrans not attempted to capture, reverse engineer and utilize shields for themselves? The tactical benefits of having essentially doubled survivability  and regerating durability would certainly be useful.
gpt
In sc2 you could do research on a nugget of protoss crystal, the ubiquitous basis of a lot of their technology. This simple material (to protoss engineers) totally blew the humans away, it could do things they didn't even know were possible, and they had no idea how it was doing it.

They're not employing protoss tech not as an oversight, but because they've no idea how to.

Imagine a faction in medieval Europe got a hold of some digital technology, maybe a server stack, what could they do with it? They couldn't even power it correctly let alone benefit from it's function.

Terrans are medieval compared to the protoss, so don't yet have the foundations required to use their shizzle.