I didn't say, "He's not being coached." He has event coaches, he does not have a multi coach.
Decs/Heps do best with a true multi coach. Event coaches are less skilled in how to teach beginners (freshmen multi eventers are often winging some of the events, or learned particularly bad technique in some events from high school coaches who were clueless in all areas but, say distance). Event coaches are used to throwers who have 5 throws practices per week with weight training weaved into that schedule, while the jumps coaches are used the the same thing for their jumpers, the pole vault coach has an every-other day jump and lift schedule for vaulters, and the sprints and hurdles coaches have their own competing plan for drills and weights. Multi event coaches know how to teach 10 events one day per week or one day every other week, with maximum efficiency, no over-training with a hundred repeats, and a healthy focus on timing. Sprinters, jumpers, and throwers train right through a season, but multi-eventers (especially decathletes) need to peak to qualify and recover and peak again for nationals like marathoners do for the Olympics. Decathlons and heptathlons, being two day events, don't happen every weekend, so that figures in, too, in terms of getting a qualifying mark and then training for nationals.
USC definitely knows what they are doing when it comes to coaching him in the sprints and hurdles.
With respect to recruiting him, no one had to have an amazing eye to find Owens, he was the #1 decathlete in the nation coming out of high school.
Anyway, Owens looks to be on track for winning nationals for a few years, and the Olympics, so dedicating a true multi coach would make a little sense, see what I mean?