The part about "desired" and "undesired" is more from how we within society like to create social constructs which dictates what, why and when something should be acceptable and desirable.

So the original point you said was correct, however my attempt was to essentially clarify it, but it seemed to have veered into a bit off-ish (it is true we desire young & healthy, but I would assume we got the reverse age tech in 200 years).

What I meant with desirable & undesirable is purely social based, there's popular and unpopular, there's kind and mean and lastly smart and dumb.

What I predict is going to be the case is that after we've eliminated all material "capital" there will still be a huge need for "social" capital. This social capital could be a very big driver for the next foreseeable future, afterall we humans are suppose to be "unique".

And consequentially this social capital COULD actual create some form of material capital again (think about how our culture has been reshaped in what is desirable, fashionable and "aesthetically authentic"), a good example is how the global cultural phenomenon of "growing by yourself" is making a comeback even though previous generations looked down on it.