you're confusing cause and effect in my view. Dame only "dominates" the ball more because he has to create a lot more of his own offense, and the team's offense as well. Curry has had the massive benefit of playing with much better passers than Dame has ever played with.
since the Aldridge/Dame team fell apart prior to the 2015-16 season, compare Dame's year-to-year usage rates to Curry's:
Dame:
31.3
31.5
30.6
29.3
30.3
31.4
29.3
33.8
Curry:
32.6
30.1
31.0
30.4
33.6
34.8
30.8
31.0
Dame has only had 1 season when he posted a usage rate over 31.5%. Curry has done it 3 times. Dame 'averaged' a usage rate of 30.9%. Curry averaged 31.8%. Dame dribbles more, but Curry uses a higher rate of his team's possessions. In fact, Dame doesn't just dominate the ball (as you describe it) to create his own offense. He does so to create his team's offense too. Curry has routinely averaged around 21% of his team's total assists. Meanwhile, Dame has averaged around 33-35% of his team's assists, and 39% in one season (2019-20). If Dame is truly more ball-dominant it's because he's never played with great talent or good passers
something else too: since that 2015-16 season, 5 different times Curry has had assisted FG rates OVER 50% and didn't have a single season under 45%. Meanwhile Dame has had 6 seasons when his assisted FG rate has been under 3o%, including a career low of 18% in 2019-20. His highest assisted FG rate was under 32%. In other words, Curry has had the major advantage of his team being talented enough to create half of his offense for him. Dame's teams have created around a quarter of his offense for him. The rest he had to create for himself and he did so while being the main focus of opposing defenses, AND being about the only player who could consistently facilitate offense for his teammates
Golden State's offense was based upon the team passing. Portland's was based upon Dame dribbling and probing because the fucking GM was too incompetent to build a complementary roster around Dame
the point being that just saying "Dame is more ball dominate" is a statement so lacking in context it's essentially meaningless