I won’t comment your numbers, because, well… Please use the same tool of yours and run with 8 billion people (entire Earth’s population), same 95% confidence level and 5% error, just to see something.
Just for comparison, the OSM Foundation run some surveys from time to time, and the most complete one is from 2021: 2021 Survey Results - OpenStreetMap Foundation
They (OSMF) hoped to get 1100 responses and managed to get 2958 full responses, with all the advertisement they did. I think a bunch of undergraduate students (no disrespect here!), with no funding or external support, managed a pretty amazing feat, also displaying the results in a more attractive and easy-to-read manner.