Exactly. And there's another reason to not just rely on current ideals or moral (which I think is really what "tech" meant in this case, even if unbeknownst to ruru). Evolution over long periods is a process that allows for poor results to be weeded out. The beings that survive tend to be better comformed to nature (physis) even if through the application of technology (techne), which is just recursively nature. This may be an analytical definition, but I'll leave that to your pondering.

If the being drastically alters himself over a short period, along with similarly altering other being like himself on a mass level, and the chosen alteration isn't well designed or considered in light of nature, and over long periods, that being will be weeded out.

Thus, there is a huge risk in drastic, immediate change, and perhaps a bit of humility and awe for the unfolding of natural processes and being would better serve man than some foolish rush towards some ill considered ideal.