I did it and didnt hate fractals afterwards, nor did any of my friends. I farmed both with "tryhard" groups (portal, best comp and everything) and with random LFG groups. Random groups took way longer yet there still was so many in LFG. People did play way more than rn.
Boxes arent just "mOaR gOlD" it's a nice gamble for infusions. That's why I mentionned nerfed boxes. When there was thousands of people farming world bosses for boxes, it was still a pretty bad farm cuz of world bosses mega outdated rewards, but the chance to get one of those rare infusion gives you the incentive to try. What if you got lucky? The little gamble with certainty of some gold is way more attracting than just stuff you already get in fractals. You won't bring new players by giving them "more fractal rewards" people will just use it for their alts
Sadly the infinite +10 is only decent for veterans but again it's +10 so you can't do much with it.