I have an alternative theory about Sale.
I believe tommy john surgery is regenerative. It doesn't just fix the elbow, it makes it stronger.
Sale had the surgery done in 2020, when he was about 31. In 2020, 2021, 2022, and 2023, he had a total of 31 starts and 150 IP, most of which occurred last year with 20 starts and 103 IP.
So my thinking is that it was/is a mistake to think of Sale as a 35 year old pitcher who is also frail and unreliable. He just had a bad elbow, which came out of the surgery better than ever. However, his recovery and other injuries, including one on the dadgum bike, delayed his return to the mound. When he finally did for real last season, he had some ups and downs, but he finished pretty well. Plus he's Chris freaking Sale, one of the most professional pitchers I've ever seen. He has terrific command of his pitches and is completely focused when he is on the mound--and that means playing defense as well.
I think the Sox, what with all the turnover in the front office (from DD to CB to Breslow), simply forgot who and what they had. Plus they assumed the 35 years applied to his arm/elbow, which it clearly does not.
Also, one more time to all the Breslow apologists: the Braves, another team from the other League, for crying out loud, saw Sale's potential when the Sox didn't--on top of which the Sox gladly shelled out $17M to the Braves/Sale to "sweeten" giving away a candidate for the Cy Young this year.