So you’re arguing that popularity is a proxy for quality? So astrology is correct? There’s endless examples of popular things that are nonsense.
Of course the opposite is not true. Things are not bad because they are popular. I just don’t think there is any inherent correlation at all. Popularity generally measures memetic power and that’s it. Cold viruses are also popular.
It can also be evidence of founder effects (JavaScript), lock in (Windows), network effects (most social media), etc.