And what of the transhumanists, such as myself, who do not invision a 'perfected human' but the use of transhumanist technologies to allow for a more diverse human population?There is no such thing as special "transhumanist" technologies, any more than there is such a thing as "technology in general" to which we can ascribe general properties like "liberating" "dehumanizing" "accelerating" "advancing" and so on. What there are, are always only actually-existing actually-emerging technoscientific knowledges and techniques and artifacts, what there are, are interminable ultimately unpredictable technodevelopmental changes with costs, risks, and benefits that can be more or can be less equitably distributed to the diversity of their stakeholders. To say otherwise is to traffic in error, misinformation, deception, self-deception, and sometimes outright fraud.
I've written endlessly many words on these topics, but it really is very simple.
If you really, truly care as you say you do about diversity and about equity-in-diversity (the second is harder, and more important), then fight for that by fighting for more democracy, for more progressive taxation to fund general welfare that renders the scene of consent more legible and to fund public investment in sustainable civilizational infrastructure without which we will soon be reduced (to the extent that we are not already) to the most brutal imaginable inequities.
Technodevelopmental struggle is of course a great gaudy player in those democratizing, secularizing, consensualizing, planetizing struggles right now, there is no denying it, but technodevelopmental struggle is still social struggle, it is subsumed nonetheless under the terms of larger, older, quite familiar social struggles in fact and contributes nothing of its own to the key principles driving that struggle. Nothing. Those who tell you otherwise are making a fool of you -- still true even if they are also making fools of themselves. (I've made the error myself, so I know what I'm talking about.)
If you really, truly do not envision an "enhanced" "perfected" "post-human" techno-transcendentalized via techno-theological omni/sooper-predication into a omniscient/sooper-intelligent omnipotent/sooper-powered omnibenevolent/sooper-abundant techno-demigod with whom you identify at the expense of identification with your fellow humans/earthlings sharing this problematic planet with you here and now, as you say you do not, then you need to take a hard look at the company you are keeping, because you have gone seriously astray.