As someone who owns a Hyundai and a Kia, this is an interesting thread to read. Going to look into some safety steps moving forward.
I think it's Autralia where like 80% of the car theft are done with the owner's key? (Too lazy to look for the citation)
Good scotty kilmer video on one such option
Having a steering wheel lock has worked so far since then, but there is a tremendous incentive for someone to ruin my car again given the chance, since it'll (maybe always) appear to be an easy target, kill switch or no.