S1RII for sports photography?

The rolling shutter criticisms of the S1RII have been dominating the conversation, yet I’m still quite confused about it. Would the slow readout speeds we’ve seen cited for the camera’s video recording modes (ranging from 20s to high 30s milliseconds) apply to photos as well? What about mechanical shutter vs electronic shutter? How would that affect rolling shutter performance?

Curious if this camera would be a viable option for sports shooting, at least in a pinch.