That's a false dichotomy. You can still travel at 50mph with air conditioning (in a car) either way. In fact, building proper bike lanes doesn't mean you can't

That's a false dichotomy. You can still travel at 50mph with air conditioning (in a car) either way. In fact, building proper bike lanes doesn't mean you can't have self driving cars too. It just means the people who didn't spend tons of money for a self driving car are less likely to hit the cyclists.