It’s my understanding that non-Catholic are supposed to remain in the pew during Communion. This is the practice in our diocese.
He was probably trying to gently explain to you that he would rather you not do this as it puts him in any awkward position.
There are several reasons not to but the main one is that the laying of hands by a priest has significant sacrament meaning. Not just everyone can receive a blessing, this is why they are so special and important. It’s also really awkward for the EMHC because we can’t give blessings. Consider refraining for now. It’ll make it just that much more special when it’s for real.