I don't know whether it's visible from where you are sitting, but what you wrote is exactly contrary to the TFA. TFA implicitly starts from "what if we forget for a minute that ROI exists, and see where that leads us". (If it seems incredibly wasteful, stay with me to the end.) And where it led them is that the people like you and me are crucial parts of Investment (the I of ROI), and the people group together. The ones that gladly do 90% toil don't like to team up with those that prefer 10% toil.
Because the problem with ROI calculation is that for some areas the ideal amount of toil would be 99% and for other 1%. For both extremes, you'll bleed valuable people, so sometimes your Investment becomes "hire new team just for that" and the rest is peanuts.
To put the thing back on its feet first create a team that takes 50% toil and give them these areas that ROI-wise require approximately 50% toil. Call the team "SRE". Create a team that takes 10% toil. Give different areas. Create a team that takes 90% toil, etc.
Because the problem with ROI calculation is that for some areas the ideal amount of toil would be 99% and for other 1%. For both extremes, you'll bleed valuable people, so sometimes your Investment becomes "hire new team just for that" and the rest is peanuts.
To put the thing back on its feet first create a team that takes 50% toil and give them these areas that ROI-wise require approximately 50% toil. Call the team "SRE". Create a team that takes 10% toil. Give different areas. Create a team that takes 90% toil, etc.