Exactly, at the same price yes the natural stone will have more 'complexity' and be lower-graded than the lab one as a result.

For decades, the marketing message was that less defects = better = more expensive. Apparently, when lab-grown diamonds came along, that had to be inverted: now, lab-grown = less defects = "less character"

The whole thing is such an obvious marketing exercise with very little to back it up (as evidenced by the extremely low resale value of diamonds)