Good grief!!!
To deny anyone, however disposed, a simple “God bless you” is exactly the kind of uncharitable legalistic scrupulosity Christ railed against.
My wife and I enjoy a mixed marriage (she is Lutheran) and I’ve had enough of a time explaining to her, and others, why they are not allowed to receive Communion in the Catholic Church. I wouldn’t even begin to advise her - or anyone - against accepting a blessing.
No matter how we may feel about the legitimacy of the Mother Church and the…questionable beliefs and practices of some other denominations, I can tell you from experience that some people view Catholics as being a stuck-up and anal-retentive old-boy network. Compared to the warm welcome given at other churches, I’m not surprised. In fact, some people are so stuck on splitting hairs with regard to policies and procedures, that they appear very much like modern-day Pharisees.
One characteristic of Catholicism is our obedience to church authority. Grumbling and nitpicking simply don’t fit this profile. Neither does second-guessing our betters. Our beloved clergy bears an increased burden of accountability for its actions, as indicated in Scripture. So let’s let them deal with it. I can’t imagine our beloved Master, on the day of reckoning, possibly chastising one of His shepherds for being too charitable in His name.
Only clergy can bless people? Perhaps in a formal manner while wearing a stole and acting as a vicar of Christ. Correct me if I’m wrong…the line starts over there!

Someone, anyone, please quote me where the CCC prohibits anyone else from saying “God bless you.”
This reminds me of the debate over whether the Pope should kiss the ground. Please don’t let’s be niggardly with our blessings. Christ said, “Love one another,” not “Make the Communion line more expeditious.”
He also said that we should be recognized by our love for one another…
Peace be with you all!