They have resources that we do not and cannot know about
Good enough to just play on its own for the card draw (its basically a blue Elvish Visionary), its obviously not quite as good as a Commander without some setup to take advantage of the draw-two abilitybut that setup isnt all that difficult
Add powerful options like , , or to keep your hand full of threats
That said, the sorcery speed of Tragic Trajectory could ruin its competitive playability
Finally, when you have 4 Grass Energy ready to go, bring Venusaur to the forefront and go berserk
Yarok, the Desecrated Yarok, the Desecrated is a value machine, doubling your enter the battlefield triggers and remember its any permanent, not just creatures, so abilities like Landfall will trigger an additional time too