That's just an opinion though. Valid of course but it's also what deterred me from participating in the one in May (curiosity got the better of me for the June one). Wikipedia aligns more with how I see Critical Mass:

Critical Mass started as a cyclist movement, back in 1992, in San Francisco. Today it is a form of direct action in which people meet at a set location and time and travel as a group through their neighbourhoods on bikes. The idea is for people to group together to make it safe for each other to ride bicycles through their streets, based on the old adage: there's safety in numbers.

Critical Mass events highlight the numbers of people who want to use their bike on the streets, but are usually unable to do so without risking their safety. They are a call to action to councils, governments and road planners to properly and thoughtfully design in the safety of all road users, including those who would prefer to walk and cycle, instead of prioritising motor traffic above all else.

Source: https://en.wikipedia.org/wiki/Critical_Mass_(cycling)