What you say about the reduced range makes sense but I don't fully trust the decision on what range to show to have all the right motives in this case when many other manufcaturers (also in ICE vehicles) adjust their shown range based on recent drives. Tesla does do this if you plan a route so they are certainly capable but unlike the mentioned toyotas, bmw's, etc they choose to use the unchanging unrealistic estimate that gets a lot of people in trouble. Given that they also stonewall when its about issues that people can't affect with their driving style or can be a matter of opinion I don't feel inclined to give them the benefit of the doubt and say maybe people should adjust their behaviour and expectations. If they are given more accurate mileage by default then it's after all much easier for them to make those considerations and realisations about what affects it.