For me, it's a combo of those things to a certain extent. I think it's not as clear cut or as black and white as many seem to think. I think in the old days Wenger certainly enjoyed the benefit of a lot of tough, strong-willed, alpha-type personalities like DB10, PV4, TA6, TH14 etc etc but also I don't think Wenger was as obsessed with this fantasy version of "pure football" that he is now so obsessed with.You have to wonder what's going on now or whether the training is essentially the same and the players themselves make all the difference. And because of the quality elsewhere (Gilberto to begin with, good cover by lunjberg and parlour, and the assorted attacking threats).Although if you really believe that the back 4 of Cole -Toure - Campbell and Lauren went unbeaten for a whole season with NO defensive training being applied you are very naive
I think the 04 Invincibles season was a double edged sword tbh. I think that season drove his ego over the top, he actually genuinely believed he was a genius and no one else in world football was at his level. This self-obsessed ego-mania then led him to the arrogant decision to go with Project Youth and Tippy Tappy and bringing in lighter players in midfield and at CH and prioritising passing and posession over everything else - even scoring goals ffs. He was almost cutting off his nose to spite his face with stupid pseudo-intellectual concepts like winning is only worth doing if it is done beautifully.