Since we’ve all forgotten media literacy, what makes Wikipedia trustworthy is that sources are cited and you can inspect those sources yourself to make a judgement call on the topic at hand.
There was never any such thing as blind trust. We learned in grade school how to evaluate sources and what types of sources are out there (primary and secondary sources, etc).
There is some level of trust in being open, transparent, and without a profit motive. But we recognize as educated people that truth is a matter of perspective, and we can build a complete picture by compiling different perspectives.
But then people like you roll in tossing casual accusations around and I guess your intention is to steer people to far less trustworthy sources than Wikipedia.