Each of these areas has a specific function and contributes to the strategy and mechanics of the game
Rootha, Mastering the Moment Rootha, Mastering the Moment wants extra turns and extra combats to wring the most value from the combat trigger
Anyways, that card itself: it enables cast-from-exile by giving you a repeatable impulse two, while also enabling cast-from-anywhere-that-isnt-your-hand synergies with Retrace
Playing them early makes them hard to remove and will almost always give you benefits
So for what red needs, this card awkwardly just does the work needed after all this time and does it really well
And as noted, there's no difference between artifact card draw and card draw from other sources (like blue instants, or white enchantments, or any other source)