Converting to "Steps"

I understand that activities such as cycling can't be converted to Steps for contractual reasons.   Could a new activity be created? let's call it "Steptivity" - it would be an amalgamation of all activities steps, cycling, swimming, etc converted to steps which would be separate and distinct from Steps.  Counting of steps is really a gauge of how active a person is, this would be a better representation of activity than Steps as its counted now.