What makes them funny?
First of all humanity is ALWAYS "evolving", like any other organism we are subject to pressures from the environment and other external factors. Of course "evolution" doesn't entail anything about moving "forward" and making "better" humans, the only result is the genes of those who reproduce more often propagate more efficiently. That's literally it. Transhumanists have this faulty understanding of evolution where it's some sort of funnel purifying the species down to it's "best" traits, those traits of course always based on their ideological and moral interpretation of what is "good", which genes do not give one flying shit about.
Then there's the idea that cutting edge technological inovation is somehow going to lead to reduced inequality and some sort of utopia as opposed to accentuating divisions even more. i.e: stuff like robotics and genetics manipulation, that will obviously only be affordable to the extremely rich. The obvious result will be something like from the movie Gattacca, not the Star Trek utopia the transhumanists desperately wish for. The themes of robotics (including nanotech) and genetic manipulations and their possible effect on humanity as a whole have been explored in many science fiction settings since at least the '50's, and often before. They aren't treading any new ground, or exploring any new ideas. Just the same rehashed wishfull thinking bullshit that always happens whenever any new tech field surfaces. World peace and understanding between all humans, they said airplanes would achieve that, and radio, and telephones, and television, and applied medicine, and etc, etc.
Ridiculously unrealistic, idealistic and dogmatic ideologies that always fail because their expectations of what humans "should" be like (communism being the obvious one) have been around forever. Deciding that the only way to achieve their goals is to deliberately change people to fit their construct has been attempted many, many times. It always fails of course. But now there is on the horizon new tech that can LITERALLY transform human beings, on the most intimate level, and the dogmatic utopianists have latched unto it as the answer to all their woes. If the world and humanity can't fit their rigid ideological constructs, then by gawd they're going to MAKE them fit, and obviously it will be for the best, because their approach is the only "good" and "moral" one.