Allowing the simple filing of a lawsuit to force a player to sit regardless of its merit might not be a great idea in a world where millions or billions of dollars are riding on game outcomes. It's unnecessary too, since some kind of evaluation of the claims can be done and it shouldn't take much time. If a cursory looks suggests fire, let him sit.
Yep, I was reading some takes that if civil suits can force a player to sit, it has potentially nefarious consequences now that sports betting is legal