Popularity and quality are not really correlated, so the first point is false. As for the second, nobody has to prove anything to you - if you're interested go take a look and you will see for yourself, otherwise don't and keep using Python.
Popularity is a good enough proxy for how good a given tool is at a given task. Go give 100 people a hammer and a tootbrush and ask them to nail a plank, and you can divine the relative usefulness of each tool based on the number of people who used each.
> As for the second, nobody has to prove anything to you
Nobody is beholden to anyone, but if you're putting a contrary position forward with no evidence be prepared to be asked to elaborate. Such is life.
Then no doubt the majority of those 100 people would use the toothbrush to hammer the nail. It is after all a far more popular tool.
Then you have PHP, which is (or at least was) an inferior langauge to Python when python started getting popular. Python does more that just web dev. Likewise with Ruby.
Python could easily be described as "better" depending on the task.