Interesting observation about what WE -- as humans -- think as "desirable traits" versus what nature itself uses to decide: adaptive value.
If a mutation makes a species MORE LIKELY TO SURVIVE, then that mutation will be further expressed because of its survival value.
Case in point: a few years ago, I bought a novel VFT clone called "Dente" -- with shark-like teeth. Very cool to look at:
3 years later, I only have THREE plants with this feature -- out of about 300 plants, all of which are derived from NINE original plants: one "dente", and 8 Home Depot rescues.
Since the cool-looking sharks teeth don't work as well as the typical intermeshing eyelash design, this clone did not do as well in my collection; probably didn't eat as many bugs as the typicals. This clone -- while selected by humans as "cool" -- does not have adaptive value. My typicals went crazy dividing, while "Dente" apparently missed a few meals!
My new strategy is to feed my "dente" clones to help them along, because they're really cool. However, Mother Nature has a different definition of "cool": that which helps a species survive.