>is not a scientific attitude
True, but asking non-scientists to have a scientists attitude is ridiculous.
This "everyone is a scientist" idea creates the "everyone is a skeptic" situation, except, when a rube is a skeptic, they're not intellectually skeptical, they're using "skeptic" to mean "bias confirmation".
If you're not a scientist (PhD and publishing) then you don't need a "scientific" attitude.
For the other 99%, you don't need a scientific attitude.
If you are diagnosed with cancer and that diagnosis is confirmed by a second doctor, do you need to demand access to your labs so you can review them personally "with a medical attitude"?
No. Frankly, the only way to have a "scientific attitude" is to spend 4-8 years praciticing in academia. If you don't do that, you can't have the attitude.
You can only pretend. Play makebelieve. Be a pretend scientist. And, almost assuredly, ignore real scientists in the process. After all, due to Illusory Superiority (Dunning-Kruger) you will think yourself just as qualified as the experts. So you will overrule them.
Trust experts or die AKA interdependence in a civilization.