It is up to YOU, not me, to prove your assertion.
I reason because you are unable to provide evidence of your assertion you do not have much of a clue as to what the Catholic Faith teaches.
Have a nice day
Q. Has it ever been a mortal sin to eat meat on Friday? Is it considered a mortal sin at this date to eat meat on Friday? At what point in history was the doctrine of abstinence from meat established? K. W. W., Searcy, Ark.
A. Yes, deliberate eating of more than two ounces of flesh meat was a grave matter and a mortal sin. (Fr. Davis, S.J.— Precepts, Moral & Pastoral Theology, p. 437.) No, it is not considered a mortal sin at this date. However, some Novus Ordo priests still say it might be a, mortal sin to eat meat on Fridays of Lent and Ash Wednesday. Abstinence from certain meat dates back to at least 1200 B.C. because Moses wrote of it in Levit XVI 29ff. St. Thomas, in the 13th century, considered it in the Summa. Clement of Alexandria did so in the 3rd century. Certainly a custom of such great antiquity should not be lightly handled. Conceivably several souls are in hell because of the mortal sin of eating meat on Friday. Shouldn't they have another chance in our Conciliar Church?