That depends if Q clearly and unmistakably coordinating with the POTUS is proof enough. That's basically undeniable at this point.
There are plenty more examples that aren't even on here, just can't keep up and keep adding them.
The initial reason many of realized Q had at least some inside info was by essentially explaining in advance how and why the SA coup would happen. If you are truly skeptical then you know there is no chance someone releases all that information mere days before an global power shifting coup in SA by coincidence.
Aside from Q/POTUS confirmation, there is the fidelity of the information provided so far, as well as the research that has been produces based on the questions given. Not enough on it's own, but it is difficult to believe that someone LARPing would have been able to wrap such a massive narrative around real events and history in such a credible way, and sustain it for so long. Even without the trip code, most oldfags could spot a fake within a few posts, or maybe a few hours if the person was really talented.
Otherwise, like you said, no harm in lurking and seeing how it all plays out. That's how I started out, now look at me.