No. It is not up to you, nor is it up to your priest. With all due respect, you cannot give what you do not have. Follow this thread:
forums.catholic-questions.org/showthread.php?t=292341
Within the thread, the OP posted a PDF of the letter. It is true and official. As I said earlier, it has a protocol number. Appearance in Notitiae, the official publication for the Congregation for Divine Worship and the Discipline of the Sacraments, is like having a new law or a new order published in the Congressional Record of the United States Congress. It is legitimate.
Now, the Congregation is currently reviewing the matter and the current practice is to not have this practice. Given the fact that the new Prefect is stricter, even moreso than his predecessor, the ruling will probably stand.
I have had children come up to me and I will not bless them because it is not mine to give. My parochial vicar will also not impart a blessing in lieu of distributing Holy Communion. In fact, we both had children come up to us at the same time and neither of us did anything.
Just like, as EMHCs, we cannot impart blessings in lieu of receiving Holy Communion, we don’t have the authority do this during the Mass when it comes to the blessing of throats. As I read the Book of Blessings, it assumes that there are legitimate occasions when a priest or a deacon will not be available. However, as both the OP and others have indicated, this occured during Mass.