I don't think MHJ has a LORE for them to follow along. They are just experiencing things as NJs are growing, if they only gambled on SOTY-worthy songs they wouldn't have invested so much on EVERY song (with their fanbase & hype, just focus on 1 catchy title track, I bet the streaming & charting would be much greater => SOTY)
Also the debut time might be decided not only by ADOR, but HYBE too, not to clash with their other artists. So the songs chosen make sense. I can't imagine hearing Ditto in summer.