carthage had 6 losing seasons in the 30 years before Surratt arrived. He came into a school with a considerable amount of consistent talent and with a consistent history of making the playoffs, and his excellent coaching got them over the hump.
Coach Buchanan did a great job at Aledo, but in his first 15 years only won one state title (in his sixth year, ironically). He then went 9 more without one, before the area growth brought more talent his way. Consequently, Aledo has won 11 of the last 15 championships despite having 3 different coaches over that time. Did they luck into 3 elite coaches in a decade? I kinda doubt it. Buchanan may have started things off, but they have a major talent edge there.
That said, HJ has 3 winning seasons in 20 years, and that was one special group of kids. BC has two winning seasons in the last 10 years, ironically enough with the same coach and QB as a couple of those decent HJ teams. You're still comparing apples to oranges. Surratt could absolutely come to those schools and turn them around and make them winners, but he's not taking them to state or anywhere close to it unless a whole bunch of kids move in with him.