I don't think it's "tiny" as OP mentioned, sure, but to my mind (and as I mentioned in another comment), that leaves a remaining 85%. 85% is a portion that I'd be comfortable using the word "most" for - eg, most of the energy usage in this country comes from sources other than light-duty vehicles. I think that's the point OP was making, word choice (eg, "tiny") aside.
There’s a good opportunity for those other use cases as many of them are centrally located and so with investment that could be in the form of government subsidies (if they could every agree on anything) to upgrade factories and utilities, etc. And at 85% utilization, you’re correct that it’s a big opportunity.
