"There's already a forest fire across the road, so nobody will care if I toss a cigarette out on this side" is the sort of idea I might have embraced myself... at 16.
Let's be real. Limiting voting from certain age would spark even bigger outrage.
It is too hard to take the vote away from this entrenched voting block despite their decaying mental state. So we're going to make sure we only disenfranchise another group that has less power.