I think not using a few websites who use scummy ad practices (of which there are sometimes ethically reasonable alternatives, like this site) is a lot easier than never driving again, though.
All my finances, banks, retirement, taxes, budgeting etc is online. most of my work (email, googling, tools) is only possible online, 90+ percent of my entertainment and social media is online. My maps, calendar, appointments, education, finding things out such as court houses address or phone number of restaurant is online. Much of my medical (presprections, appoint schedule, doctor/nurse correspondence) is online. Most of my shopping is on line.
If there were a real change in driving habits that the providers could trace to the presence of lead in gasoline, don't you think they would have taken it out?
The context seems consistent with that being the intended thrust of the argument, but its literal wording (https://news.ycombinator.com/item?id=19962410):
> This is like saying in 1950 that companies will take the lead out of gasoline if we all stop driving.
seems to claim, not just that enforced regulations rather than consumer-led boycotts were the right way to address the issue of leaded gasoline, but that boycotts wouldn't have worked.
If your gloss is the correct one, then I find the argument much more plausible than a literal reading suggests.