HTupolev

I would imagine that "correct" spoke tension is tension that's high enough that the spoke doesn't fatigue rapidly from slackening in use, and low enough to not create issues at its interfaces (such as damaging the nipple or the rim). Obviously that's a pretty wide range, and dished real wheels with equal numbers of spokes on each side necessarily require a wide range.

I'd actually kind of flip the order. "Correct" spoke tension is probably more important than even tension. A wheel with spoke tensions all over the map (but all individually reasonable) will be more durable than an evenly-tensioned wheel where all the spokes are badly undertensioned. But, correctness and evenness tend to go hand-in-hand in a well-built wheel.
Start with an untrue rim, and then you need to compromise between wheel true and appropriate tension...