A few more people would probably use bikes, but I don’t see how this solves the issue, no matter how good the cycling infrastructure we won’t see cars and gas stations just disappear. I suspect I don’t see the goals as you intend them, but I don’t see people dropping there kids off at school on bikes or biking to and from a restaurant to eat a steak dinner, not to mention city services and transportation. If your target is really emissions I’d suspect that electric cars and limiting private jets would make more progress.
It sure feels that way, explaining to kids that YouTubers will say anything to get you to keep watching, meanwhile the elderly are following Qanon bullshit.