Banning the shift is, like the pitch clock, a solution in search of a problem.
Leaguewide BABIP over time:
It has been historically high for the past 25 years, including well into the current shift trend, with a slight tick down in the small sample size 2020 COVID season.
There is no evidence that the explosion of shifting in the last ~5 years has depressed hits on balls put in play. This crusade against the shift is purely aesthetic or at best a misplaced appeal to traditionalism; it's people annoyed by / fearful of change, or who just see more shifting and assume it must be the reason there are fewer balls in play, when the evidence does not support this.
The real issue is fewer balls in play, and the culprit is strikeouts. So any attempt to fix the issue needs to target strikeout rates and TTO hitters. Defensive positioning is not the way to accomplish this.
Leaguewide BABIP over time:

It has been historically high for the past 25 years, including well into the current shift trend, with a slight tick down in the small sample size 2020 COVID season.
There is no evidence that the explosion of shifting in the last ~5 years has depressed hits on balls put in play. This crusade against the shift is purely aesthetic or at best a misplaced appeal to traditionalism; it's people annoyed by / fearful of change, or who just see more shifting and assume it must be the reason there are fewer balls in play, when the evidence does not support this.
The real issue is fewer balls in play, and the culprit is strikeouts. So any attempt to fix the issue needs to target strikeout rates and TTO hitters. Defensive positioning is not the way to accomplish this.