If you want to follow a YU version of a chumra, go ahead and listen to Sam. I don’t think even any YUniks believe that though, it was just something said over in a shiur. Some people need to say things just to have their own knaitch. If you are from any other walk off life, just go ahead and ignore what he says.
“Only 1 Deoraisa”. Do you mean as opposed to something serious?