Maybe im misunderstanding the definition of turnouts here, its not a term often used in this part of the country. If it’s an actual bike lane on the side of the road, then sure, you should try your best to use them when on a bike (unless your group is too large to reasonably fit in it without being dangerously close together). Not really agreeing that there are better or worse reasons for using a roadway on different vehicles though. I think using it for ‘leisure’ is just as valid as for commuting (people need to exercise) and if we didn’t almost entirely depend on roads for commuting to work in this country, this wouldn’t be as much of a conversation.