Nope. You are confusing what is necessary for validity with what is necessary for liceity.
To get at what is necessary for validity, one examines the ceremonies of ordination across all the liturgical rites in search of what is common to all. In doing this, one sees that the imposition of hands is the only common matter across rites. Hence and contrary to the Council of Florence, Pius XII defined imposition of hands as the necessary matter of Orders for validity.
If you really want to make a the head of a neoscholastic theologian explode, research what is the necessary form for valid ordinations.
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I challenge you to find one time that I used the word "validity" or "valid" in this thread. The Consecration of the Priest's hands and paten and chalice are required not for the "validity" of the Sacrament, but for the perfection of the power of the Sacrament.
And, no, you are wrong, one does not take a least-common-denominator approach to determining validity of a Sacrament. One looks at what the highest Roman Catholic Church authorities have said is necessary for validity in the Roman Rite.
Other Rites (Byzantine, etc.) are different and what is valid in the Byzantine Rite does not necessarily transfer to the Roman Rite automatically. That incorrect assumption is part of the Modernist-Ecuмenist deception. If a Pope has defined "the form" in the Roman Rite to be X (and otherwise said it is invalid), then "the form" in the Roman Rite must be X. It doesn't matter what another Rite does.