You shouldn't lock out the CV just in case someone who hasn't done the tutorial yet is in position to drive the CV out of danger and back to safety. Can you imagine the fallout if this happened? "Okay, CV is safe for now but you're the only one around so you gotta hop in and drive it back to base before more trouble arrives" "Uhhh, guys? The game is telling me I need to play some tutorial first, what do I do?" Locking the opt-in button is fair play, though.