I agree with the sentiment, but trans-humanism as a concept has to fight uphill in all directions to not wind up as repackaged eugenics.

To improve upon the human form in a way that serves future generations is a path fraught with ethical problems. How does one value a change or augmentation to human form as an improvement? Who gets to improve or be improved? What happens when the technology or treatments are too resource intensive or expensive for everyone? What keeps the rich and powerful from hoarding all the life-extending improvements from the rest?

At the very minimum, supplying something like an inject-able gene therapy to the masses must be conducted at a global scale - far greater than what it took to eradicate smallpox. Anything less, and we're picking winners and losers, and slide down the slippery ethical slope.