My quality of life is increased by having more bike lanes so that I can get around _faster_ and _healthier_ than having to use my car. I'm also able to get where I want and need to be on my own schedule by car, bike, public transit, and walking — which mode matters based on the needs of the destination.
I shop at Costco by bike most of the time. Once every couple of months there's enough that needs to be bought that I use the car.
I have a dental appointment tomorrow: I can walk or cycle there faster than I can drive and find parking. I have another appointment on Monday at a hospital and I'll cycle there far faster than I can take public transit _or_ private car, and I won't have to pay ~$15/hour for parking or park a kilometre away.
Get out of your North American car bubble and look at what Paris and the Netherlands have done: they have not banned private car ownership or use, but they have removed some of them from streets. Utrecht just opened a massive underground _bike parking garage_ but it's also one of the busiest cities in the Netherlands in terms of car traffic.
There is no war on cars; that's something that has been invented out of whole cloth. Those of us who agitate for improved _options_ simply want (1) cars to pay their full freight (they don't, not by a long shot); (2) safer roads for pedestrians, cyclists, and those who want alternative mobility options; (3) more public transit; and (3) fewer cars moving slower because that's the only way to alleviate traffic.
You're not in traffic: you are traffic.
Your claim that designing for cars is designing for people is risible. Designing for people first (that's the goal!) means larger sidewalks, more barriers so that distracted or angry drivers find it harder to find themselves on those sidewalks, and fewer cars with clear rules so that vulnerable road users have absolute priority over people in cars. The larger and faster your vehicle, the more responsibility you should have, both in terms of liability when you inevitably collide with an obstruction and in terms of what you pay to keep the roads and surrounding infrastructure maintained.