Are you sure it isn't just your ears that have an uncommon shape, unfit for most earphones? Mine can't hold anything but the deepest plugs, I've given up on anything else over a decade ago. Especially apple ones since they are rounder than average.

It's indeed 'my' problem. But I really wonder if as a market segment, we are trying to go too vertical, rather than solve the problem for everyone (also I'm not sure the % of people that have my same problem, but empirically it sounds big enough to worry about it, even if you are apple)