I really enjoyed this read. Hale made a bunch of solid observations and points: https://davidmhale.com/2019/06/18/strength-of-schedule-is-the-friggin-wo....
Strength of schedule is not a metric to determine how good a team is. It is simply a measure of our confidence in the quality of those teams.
So, what's all this mean? Should we just abandon strength of schedule as a metric?
Of course not. A win against Alabama is more impressive than a win against Alabama State. No one should argue this. But what needs to be remembered is that if Team A beats Alabama, and Team B beats Alabama State, we cannot then use that information to definitively say that Team A is better than Team B. All we can say is that, all other information being equal, we're more certain that Team A is legitimately good than we are about Team B.