I long ago realised that the secret of human happiness is not giving a toss what other people think of you.
Amen to that.
But of course, that's only part of it. Living with what others find "lame" in you, sure; but also, living with what, given others' certitude, might appear kind of lame even to you, and wholly irrespective of what others think of you, I'd say that takes some remarkable, and IMO deliberate, confidence in oneself and one's world-view.
For instance, when faced with what everyone around you agrees is an otherworldly manifestation, if you can go out and follow David Attenborough's exhortation of "looking harder", and debunk that view to your full satisfaction, well then that's one thing; but if as often happens in practice, given your own limited resources of time and effort and energy/interest, as well as the large number of issues that might surround you, broadly speaking, then, to be satisfied with a lame-sounding "I don't know" in the face of others' strongly held view that it's a ghost -- and of course, this is just an example, it could be anything, not just ghosts, God for instance, or UFOs, or planetary alignments --
that, even leaving aside what others might think of you, does take a very fundamental sense of self-worth as well as confidence in one's worldview.
---
Of course, such "confidence" in one's "world-view" -- others might see it as obstinacy -- might swing both ways. The same might, not unreasonably, be said of the moon landings, after all, right?
And this points at a very real practical issue when it comes to skepticism. Most people cannot, or at least, will not
want to, devote all of one's life to debunking all kinds of weird ideas : so that, to stick to a sane worldview, often in the teeth of a very different view held by most others, takes not just obstinacy, but also a, I don't know, a certain discernment?
But that "discernment", isn't there necessarily something of a 'No true Scotsman' about it?
True skepticism is, ultimately, hard work. The difficulty is, this kind of hard work, beyond a point, isn't really feasible for most people at most times, and, in any case, does not really make for much of "human happiness"!