I know Buddhism does not proselytize, but one way or another people are drawn to it, stumble upon it, study it and adopt it. I'm talking mainly about Mahayana, Zen, Theravada, Nichiren, etc.
I was reading something about keeping the secrecy of Vajrayana, secrecy on a few levels, personal being one. From what I read, I inferred (rightly or wrongly) that Vajrayana itself should be/have been kept secret. My question is, if it was to be kept secret, how would anyone know about it and decide it was the path for them?
I stumbled on it because of a post on this site referring to deity yoga, for example, which piqued my interest. Had that post never come up, I probably never would have delved into Vajrayana, despite there being a DIR subforum about it. So, if it was to be kept secret, how would one learn about it?
Is this a stupid no-brainer question?
No, it's not a stupid no-brainer question lol! It is a very very valid question.
When it comes to Vajrayana, not all Vajrayana practitioners have initiations into the higher practices... some remain with very basic practices even after years of being Vajrayana Buddhists.
To clear things up a little first, there is no difference between Theravada, Mahayana or Vajrayana. Of course the way Buddhism is practiced is different, but what is similar is... the end result of the practice in either schools will lead one to liberation aka Enlightenment. I've had people arguing to me about how different the belief and the 3 schools are.. but lets just put it this way, just because I come from Harvard, and my other friends from Oxford and MIT, it does not mean we're any less or different, the end result is we get a phD.
It is true what you said that Vajrayana was secret initially. In the time of the Buddha, there were teachings of Vajrayana that the Buddha taught to his close disciples which was kept secret from many of Buddha's other students. This is not to say that Vajrayana is 'higher' or more 'superior' than the other teachings of the Buddha. But it is something that was to preserve to the times when it is most needed... like now, the Kaliyuga age. In this Kaliyuga age, where people are burdened by desires and attachments, the Vajrayana path is a swift way to cut off all of our desires and a swift road to liberation.
Of course, not everyone is suited for the Vajrayana path. Buddha taught 84000 ways to Enlightenment, and the practices in Vajrayana is just part of it. The secrecy of Vajrayana practices is not that people are not allowed to know about Vajrayana... you can! And any Vajrayana Buddhist centre will explain to you. The only thing that is kept secret is the higher tantras, something that only your Guru will initiate you into if you are ready.
People often ask, why keep the higher tantras secret if you know it is so beneficial? The answer is simple... because for practitioners that are not stable, practicing these higher tantras will do more harm to them than to actually bring any benefit to them. How does it bring harm to us? The simplest example... is if we do not uphold even our refuge vows, we generate deep negative karma because these are vows taken to the 3 Jewels and our Guru. And some of these higher tantric practices requires not just refuge vows, but the Boddhisattvas vows too... So for those that take initiations with a free hand... if they don't keep the vows clean, they will spiral down samsara very quickly and it will be very difficult to help pull them up spiritually again...
Secret doesn't mean it is superior... it is secret for our own protection.