ahh... Well, it's a while since the time I posted... Yes I'd say those kinds of docking stations where you stick bare disks into the device... Those mean you handle bare disks more.... Higher chance of jolting disks... And higher chance of damaging disks. This I think is even more risky to disks than external enclosures. I'm not sure why people even consider this as an offline storage solution, at most it's useable as redundant backup... Mostly best for formatting and testing drives.
For disk longevity, I'd still want a sturdy machine to place them in. There are some large heavy hotswap cases that can be used, but sort of clashes against the idea of wanting small computers like laptops and tablets...
Knock on wood, but in recent times and probably all times, the disks I've owned, the ones that weren't kept in a sturdy enclosure all the time (namely, a desktop computer case) were the ones that failed first.