We do. Sign of the cross, the genuflexions, the novenas, fish on Friday, are all outside of the doctrines of the Church. What we don’t do is read “water” and think “womb” or read “not by faith alone” and think “by faith alone”, or “hold the traditions which you have learned” and think “sola scriptura”.
Yes, and pray to Mary and the Saints, etc., etc., etc.