I've crawled under my motorhome and cars many times, usually doing my own servicing. Similarly, I crawl in the engine room of our boat prior to every trip. But I've never needed a ratchet driver with phillips, slotted or torx bit, which are what Carson purchased, in those situations. I doubt he bought them to take under his motorhome.
No disagreement on the utility of a socket set, and the occasional need for a socket not in the set, but that has no relevance to screwdriver bits. That's why neither Carson nor I "got" it.
I bought a similar ratchet screwdriver set not too long ago, although not quite as complete as Carson's. I also didn't really need it, given all the tools I have in my various toolboxes. The underside of my motorhome and engine room of the boat were furthest from my mind when I bought the set from the "junk bin" at my local Ace Hardware store. I have used the set several times, but not under the motorhome.
Apologies if this or my prior response are misunderstood.