If George doesn’t understand the difference between “should” and “I’m asking” in a sentence, he should give back his Rhodes scholarship.
It is also who the remark is directed to.
If I tell my cat that Boomer should mind his P's and Q's, I haven't asked Boomer anything. I haven't communicated with Boomer.
Trump told the press that China should investigate a particular possibility of corruption. He never asked, "should have'd" or otherwise remared that to anybody in China.