If the light stays red while the "walk" sign is active (usually the case) it's a whole lot less likely that there will actually be a pedestrian there during the turn. There's also a bit more time (while waiting for the light) to see a bike approaching. Yes, all parties still violate the law and accidents can still happen, but they become less likely.
https://www.codot.gov/safety/shift-into-safe-news/2025/march...