No one said we couldn't do both. In my mind though, culture is more difficult to rebuild than talent. If the roster somehow pulls a .500 season despite the current headwinds, then Ainge, Zanick, and Hardy are in a good position in regard to the latter. That means their valuable players on the roster who are doing the right things. You can always acquire more people with the skills, but mindset is a more difficult beast.
Not to go life coach, but I'm a firm believer that you cannot teach mindset. Rather, that's something learned through experience and self-realization. In most cases, for someone to move beyond their current station, they first have to WANT to do that. If this club pulls a play-in type of season despite the gauntlet of great teams they will push through, that means there's something there that needs to be built around and encouraged.