First, the GA fleet worldwide uses 500 tons of lead per year. Compared to 5,000,000 tons when leaded car gas was in use. That's a 99% reduction in lead pollution, so let's not be so dramatic and claim that flying a piston GA plane is "evil" and that we're all going to die from it and how it's poisoning low income communities in particular. Last I checked there are many middle and upper middle class neighborhoods that exist near regional airports. I know this all too well because those are the same NIMBYs that move in next to an airport that has existed there for the past century and then try to close it because of noise complaints.
Second, since I'm sure you don't know, most GA planes can fly perfectly fine on unleaded gas. Some engines are diesel and some burn Jet A (the same as airliners), none of which have lead. Some small trainer aircraft are electric now too.
Third, unleaded G100UL exists, is certified, and is actively being rolled out. If only we could get the FAA to stop doing what they always do, which is move as slow as glaciers about anything related to GA. I'm not going to defend leaded gas, we all want to see it gone if for nothing else than to take away this ridiculous talking point from the ignorant. It should have been done 50 years ago if the FAA wasn't boneheaded, but I'm also not going to loose sleep over burning a minuscule amount of lead when natural lead sources and lead pipes/paint still exist in the world.
By the way, my home water source is a well 250ft from the end of a runway. I've had lab tests run on it for lead and it's well below the EPA limit. I put my health where my mouth is, I look forward to the day when it's all unleaded fuel being burned but until then it's not something that concerns me.