Non-catholics traditionally only claim two sacraments: baptism and ‘the Lord’s Supper’ because they are the only two instituted by Jesus during his earthly ministry. Marriage existed before Jesus, and his miracle at Cana and his preaching on marriage only clarified and consecrated a pre-existing social institution. Something like that might be the explanation for eliminating Holy Matrimony. But, of course, baptism existed before Jesus permitted John to Baptise him. And Jesus touched many and healed them with his touch. And Jesus forgave sins, which scandalized the Jewish religious leaders. And, at the Last Supper, while he was instituting the Eucharist, Jesus was also instituting the priesthood. So, there seems plenty of Scriptural support for the seven sacraments. Perhaps this is just another thing for Catholics and Protestants to discuss as they seek to return to being the one described by Jesus in his Priestly Prayer to the Father in the Upper Room.