If you are willing to risk the value of your house against that never failing, go for it. Just because something works, doesnt make it right or safe for that matter. It is sometmes a real pain to pull wire but you ned to weigh it against the risk. If you did have a fire in your garage that would be the first thing looked at and may be blamed even if it was not the cause.
Why not put a junction box before the drier and connect both plugs with the proper size romex. As long as the circuit breaker is sized properly and you dont run both items at the same time you will have no issues. If you forget and try to run both the breaker will trip and no harm done.
Artificial Intelligence is no match for Natural Stupidity