Yes, that's true, but it is still generally accepted that a completed project is a result of some collective effort where people of varying degree of seniority and ability contribute. There is also not a singular event of a project being completed with a list of heroes/geniuses making it happen, but rather a whole lifecycle of gradual development, maintenance and going out of relevance with contributors coming and going.

I can imagine mathematics of the future being more like that rather than history of discoveries with dates and names