Yeah, it's almost an issue I have with fantasy's internal format that hasn't aged well as the league's changed.
The main fantasy football format was designed around a time when every team just started a main RB, so it was an important - maybe even the key - position for a team.
In the last decade or so, not only have almost all the teams shifted from the titular starting RB to committee setups, but also the league's greatly shifted towards a much heavier emphasis on the passing game - with the RB now serving much more of a complementary role, away from what had also been such a long held emphasis on running the ball.
It's really stripped the position bare fantasy-wise. I've wanted to try to figure out a way to balance it out properly in formatting a league but have been unsure how to properly do so.