Oh boy you're wrong. Many people (including myself) are experts at doing 0 to 0.8. The rest is much more difficult.

This is very subjective of course. Some might do only 0 to 0.1 and claim it is 1

True. Some people announce their OSS project and upload it to package management the day they start. While I develop something for two years and still find myself hesitatkng whether it’s good enough to announce.

This is news to me having watched many many many people fail to do 0 to 1.

Maybe you're just a really really good engineer and product thinking hybrid!