You're forgetting that you could also track secondhand assist as well.

I can't speak for programming but in soccer this is well-known. It's just very hard to Value just like an employer would in terms of having that person on board for morale. Fortunately the better people get it and understand that that person should be value even if they weren't directly involved in making the change but they were definitely a part of it.

This is what plagues me with most corporate companies in the United States. It should be about teamwork not about what this person did or I did, rather what the team did.

Sure you can value people individually, but teams trump individuals all day long in the long run.