70%? It's not like Collaros is putting in 30% of the work; QB is a major part of a team's success.
No doubt there are a number of pivots who'd thrive behind this O-line but he still needs the tools to be successful: a good arm, accurate passing, vision of the field, mobility, plus intangibles like leadership. Collaros possesses all of those even if the hogs up front are making his job easier to do. He still has to execute and he's been surgically efficient in 2021.
It's an amalgam of equal parts, IMO. Which is to say nothing about the RBs, receivers, and coaches (OC in particular). This offense as a whole has more often than not been lights out this season and perhaps the most balanced, well-oiled offensive unit we've seen in these parts in years.