Dominant, at least to me, is a player you can plug into any squad and become an instant contender. Shaq, LeBron, Jordan, etc.
If you genuinely think that you can put Stephen Curry onto any team in the league and they're finals bound you're lying to yourself. Him and the current Golden State setup are a match made in heaven and I'm sure Steph knows that as well as I do.
The aforementioned three players were taking dirt squads to the Playoffs in their young years while Steph was struggling to win 30 games in a season. It's really not even a comparison. Steph has definitely gotten BETTER but his ascension very conveniently coincides with the mass improvement of his team, the hiring of a Top 3 coach, and a Golden State system that boosts his offensive strengths while having the personnel to mask his defensive weaknesses.