the best coaches tailor their offense to their talent

just because "running between the tackles is what you do" doesn't mean you sledgehammer Alvin Kamara on dive plays 30 times a game and take him off the field for passing downs

Arians knew the quarterback he was getting (whether he wanted him or not) so it's flat out bad coaching to not alter anything

of course, this also shows why the Brady-Belichick success was so sustained