We're talking batteries here though. 'gene manipulation' & 'radioactive sources' dangers are irrelevant.
Straightforward batteries, extremely powerful, safe enough and way beyond what can be conceived of on an obscure little forum populated by ebike enthusiasts (however knowledgeable etc) - will be in use, it's safe to say, right now around the world. Just not for us.
And 'trickle down' frequently does not apply as often as we might think or want - otherwise there would be no hunger, no thirst, no extreme and degrading dehumanising poverty etc.
Some things are just not allowed to happen for the masses.
Power = power.
We simply don't have it in the way that those that do have - whatever the need or benefit.
For even a 'fit for public knowledge' example of what's on the tables right now take a wee look at the DARPA wiki linked. It reads like science fiction fantasies. Can you or I begin to even imagine what's not fit for public knowledge?
And everything has to be powered, often in the field, discretely.
Just saying....