I’ve definitely been a part of teams where we came up with ideas as a team. Individuals contributed, but the actual innovation came from the collective bouncing back-and-forth of ideas.
We could get pedantic and say “it was still individuals coming up with the ideas” but that’s needlessly splitting hairs and in my experience it’s the team environment/cohesion that facilitates people coming up with said ideas.
Furthermore, even the ideas of “let’s use X to measure Y” are VERY rarely completely new and unheard of ideas from a single individual. Far more common that those ideas come from long term collaboration/discussions between multiple field experts.
Ideas on large projects are almost always collaborative. There's never just one spark of insight - you've talked about the problem for a long time, and the whole team slowly chipped away at "but we can't do that because X, Y, Z".
The idea of a single genius motivating it belies pretty much every large project in existence. (Based on personal experience, the threshold where it's not just a single person having the crucial breakthroughs seems to be at projects requiring teams of ~20+ persons)
You solve problems via "Yes, and", not via "behold the genius".
You might be right in the strictest sense that an idea comes from one person, but it's a largely worthless observation, because the idea gets you absolutely nothing without the work.
Like what?
However. The most important part of innovation on a large project. Getting the team motivated by the vision and having each individual feel free to try to innovate. Otherwise individual problems being solved mean jack all and no single individual is going to build a very complicated project. There are some people who try but they are quickly outrun by dedicated teams. At a minimum it’s to have team members help you stay focused and motivated when you have moments of disbelief.