LOL. I don’t think so. Here is what the GIRM says of the entrance:
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foster the unity of those who have been gathered, introduce their thoughts to the mystery of the liturgical season or festivity, and accompany the procession of the priest and ministers.*
There is no other instructions given in the GIRM as to music. Sing to the Lord says:
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*
usccb.org/liturgy/SingToTheLord.pdf
I found nothing upon which your statement could be based. Might I suggest you tell us where you came up with your statement? If it is your opinion, that is fine, except in as far as you accuse others of error for disagreeing with a personal opinion you hold. I personally choose music reflect of the Gospel, any of the readings or the occasion. For example, I sang
O Sanctissima on Mother’s Day, I refuse to accept this as an error unless you can give some pretty black and white evidence. I do not think the Church holds your opinion.