I get it I know they are expressions but please use some caution. How about ” he/she knows a lot of people”? Makes more sense than saying everybody from a grammatical standpoint it is also more more logical.
How about the word “know” do you really know someone? My guess is you maybe getting to know someone or have a good sense of who the person is. When you know someone my guess is you need to think to yourself; Do I know them to the point that I will point my name next to theirs and refer them? Not that you need to stand by their work, things happen. But what I mean is if you really “know” someone you should be willing to share them with others and be willing to risk a piece of your reputation when referring them.