The context is professional riders, spirit of the rule, not it's actual observance, as you correctly point out Roglic would have chased and caught under similar circumstances, if he were pulling the team car w a rope wrapped around his waist. He would have bridged, contested the stage just as he did, Grand Tour, putting time leaders jersey. The only mistake made was by the officials for enforcing a petty provision against a high visibility offender and letting all the other motorcycle, car grabbing cheats go unrecognized because at @2,3 hours off the back ,
that looks like kicking while they are down.
This happens in many professional sports were the officiating crew become part of the competition, instead of background were they belong.
Big picture rolling Roglic, doesn't think even an extra 20 seconds is a big deal.. He has that Arnold Schwarzenegger cool confidence that draws people to him..gave out Enric Mas compliment because he can..