I get your point, so probably horse=yes should be removed here.
But if you want to comment a changeset, you should address your comment to the mapper who introduced "horse=yes" here.  If you inspect the history of those ways, you will see that my changeset was not about deciding to change access for horses but to clean up some obvious errors in tags (merely for pedestrians or to remove motor_vehicle=no, which is implicit for paths and footways).