I think this article is spot on, fair to both sides but in the end realistic about the Colts dilemma.
https://www.si.com/nfl/colts/news/jo...contract-trade
FTA:
Running the ball is important today with the two-high shell looks defenses are running. But the run game depends on so many people as a whole that the actual running back is only a part of that. Scheme, numbers, and offensive line are all things I think about when it comes to how well you're able to run the ball. If those things are done right, you can place any running back in there and have solid numbers.
Would they be Jonathan Taylor? Absolutely not. But could they give you 80% of his production for only a tenth of the cost? Probably, and it seems like that is a bet the Colts are willing to make.