Indeed.
There are two things here. First, the idea that DB is making a selfless choice suggests he has alternative options that would have a significant impact on our performance. I'm not sure he does. If DB was leaving out players that could have a significant impact on our chance of winning, then sure - I might buy this idea. However, names like Bennell and Morton have been mentioned, and they haven't exactly been ripping it up.
Second, if we want to talk about DB's self-interet I think it would be counter-productive for DB to deviate from the 'kids' game plan. DB's chances of getting recontracted go into a death spiral if he deviates from the line he's consistently held. DB doesn't have the option, but if he had subpar senior players that will never be around when we're any good and chose them over youngsters we need to develop because they're better able to compete now I suggest that would not help his chances of getting recontracted, because it would undermine everything he's said over his journey as senior Coach.