Star Trek suffered because it tried to rationalise and explain how and why something worked when it really didn't matter.
Sometimes they didn't. I remember at the beginning of "Best of both Worlds" they were talking about how the Borg could reach them so fast. All the said was "I guess they must have better engines" basically, and nothing else comes of it.
Is that what you mean by not explaining stuff, but it doesn't matter if they do or don't?