Actual genetic recessions get wiped out after some generations.
Not without a selection process they don't. It's still not likely to become a problem due to our rapidly growing ability to cope with it and take corrective actions.
With bad selection criteria it will last some generations more, but many not in evolutionary numbers. They might last for a few hundreds of generations, but not ten-thousands.
But having unneeded organs like eyes in a dark cave or an appendix in a human is more of a risk than a gain
The point was that when you remove the selection criteria the traits will follow.
Yes, that is the point. The selection criteria is to best adapted to the environment. And if the environment changes what has been a pro can change in a con. The most adaptive will survive, probably ants ant cockroaches.
Not without a selection process they don't. It's still not likely to become a problem due to our rapidly growing ability to cope with it and take corrective actions.
The point was that when you remove the selection criteria the traits will follow.