Of course didn't bend God to man's will.  The council fathers and Pope St. Pius V who promulgated the documents and decisions of that dogmatic council were bound, like everyone before or after them, by Divine Revelation, that is, both Sacred Scripture and Sacred Tradition.
Christ instituted all 7 sacraments.  In the case of Baptism, He certainly specified water.  In the case of ordination, he ordained the Appstles at the Last Supper.
Read the decrees of that Council for yourself.