It's an idealists dream but unfortunately it does not take into account the natural and very primal urges that have driven mankind to become the worlds top predator.
All you say has a sense to it , the fact is that such concepts as "many hands make light work" and "two heads are better than one" are generaly true.
The problem is that we are very tribal.

Whichever way someone wishes to follow there will always be those who wish to walk a completely different path.

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Fate decides who walks into your life, you decide who you let stay, who you let walk away, and who you refuse to let walk out.