If it comes down to buying a product with decent instructions, or a product with no instructions and having that company expect me to spend "a few hours or days" to figure it out, guess which one I'm buying? That's just bad business.
You'll never know which is which until after it's purchased. Also, making the highest quality and best performing parts and systems available tends to overcome the "drawback" of expecting customers to have a clue.
The vast majority of stuff like this is sold to pros anyway. They know what they're doing. Trying to educate the masses is an exercise in futility.