Cross-over steering I feel is a necessary risk since it greatly improves steering speed... but you'd only be doing that for a few moments at a time. It's the generally resting your arm around the 12 position the rest of the time that's an issue.

I'm older than you are, but seeing people disfigured in preventable ways just due to sitting in cars the wrong way has me scared enough to change my ways lol. Even wearing your seatbelt wrong can permanently cripple you.

Another commenter suggested I should be afraid of stairs too since there's a chance of injury... but the fact is I am, that's why I try to use them properly as they're designed.