They are big deal though.
The positions haven't really changed. Players and pundits like to say that the PG position has changed from the guy that brings the ball up and passes to the open man, but that's a lie. Bob Cousy, the OG Point God, was the leading scorer of the Celtics and took the most shots a number of years. Walt Frazier has lead the team in scoring.
Ben Simmons plays PG, like an actual PG, but he's 6'10. He lays with an actual SG and guards PGs and switches and all that good shyt.
If Ben Simmons played PF, the entire team dynamic changes because he can't shoot for shyt. He'll play closer to the basket. Teams will not be able to double Embiid so hard.
Walt Frazier won a ring as the best player, I forgot about him.