It's still information. 1 or 2 games of anything is relatively worthless, but all things contribute to the overall sample. Let someone watch the scrimmages and give scouting reports. It gets filed away and then can be compiled with everyone else's view to form a real consensus.
Besides that I don't think anyone's going to get too carried away browbeating others over opinions formed because of the prospect scrimmage, or the WJCs, or the 1-5 NCAA or CHL games they might catch on TV.
It's just kind of off-putting and arrogant to, apropos of nothing, take a potshot at the prospect scrimmage because it will "make people think they're experts" when the reality is that nobody on here, not you or me or even someone with Cuda season tickets, is anything close to an expert.