How much do you really need to flush down straight into the sewer (which also requires treatment)?
When I give someone my root password, I assume they can delete all my files.
When I give them a limited shell account and set permissions correctly, I don't make that assumption.
This exploit is more like the later than the former: WPA was supposed to keep traffic of each individual user safe, and now it doesn't.
If twelve years doesn't cut it, I doubt four to eight more will.
Except that those first 12 years were usually spent in local and public schools. The quality of teaching, and perhaps more importantly, what is taught, varies widely based on what community those schools are in (just look at the news about Texas or other bible states gutting science curricula of schools, with ballot measures or legislative decisions).
Higher education, by and large, enjoys the benefit of being a little less public, and can thus teach a curriculum based on science and fact if it wants to, rather than the opinions of the loudest groups in a given district.
Also, many kids travel away from home, or out-of-state to go to school, giving them exposure to a broader range of ideas and cultures.
So yeah, I'm going to say that when arguing that a solid education is important to effective participation in a democracy, it is valid to think four more years might succeed where 12 failed.
First, hydrogen has an energy density of 142 MJ/kg, whereas your gasoline is 45.8.
Second, huge amounts (~70%) of the energy in a tank of gasoline is wasted as heat, whereas a motor can convert closer to 80 or 90% into motion. So we can slash the tank size if we're not going to burn two thirds of it.
Third: why hot swap batteries? They're big and heavy. A small, ultra-high capacity capacitor can actually hold very high potential for quite awhile, and can charge in seconds.
I appreciate that the simplicity of gasoline and it's relatively high energy density was indeed the best thing for the last century, allowing energy to be moved and used anywhere anytime with relatively simple machines. But I think to assume that because it was the best means it is the best and to ignore newer technologies is to miss a possible solution to a looming catastrophe as the days of the petroleum based economy are certainly dwindling.