I think this is directed mostly at the people who will never take another math class after they leave high school. Speaking from a canadian perspective, I had Grade 11 Math, Grade 12 Math, and Calculus classes. about half of the work in grade 12 was directly preparatory for the calc class. Students persuing a trade/vocational school or no post secondary education would only have taken 11 and 12 math. if the half of the math class that was 'wasted' calc prep was replaced with 'probability in the real world' type material, you'd still be in the basic precalc stats area, but possibly giving something more useful to the kind of people that are not well represented at a site like this.

True, but you don't need a lot of calculus to do a large amount of interesting statistics and probability. And the little you do need is probably better being taught as needed in response to actual problems showing up. Most people learn better when they see a clear reason for what they are being taught.

Start with discrete probability, no calculus needed. Then when you move to continuous case show how integrals show up naturally in place of sums, and hey presto a clear and obvious intro calculus which far more people will understand the use for.