Oh, our perception of counter-intuitive behavior is all on us. We, and I include myself - think/thought we were the apex predators - and that was one very uncomfortable realization.
We look at their bulk and assume they'd be clumsy, maybe slow, possibly uncoordinated to a degree - and the opposite is true. Fast, very coordinated, and have the ability to go into stealth mode at will - much better than we can. That's a real eye-opener. Nothing like I would have expected.
We look at their primitive appearance, and assume they're dumb. Just a big, dumb animal. Just the opposite - very clever, very adapted to their environment, and skilled enough to avoid us at will, although I think some of the youngsters get careless time to time and get spotted. But even they can cover lots of ground fast, and quickly disappear.
We think we can surely see something so large if one is around. BS. Masters of camouflage, masters at concealing themselves low and in the shadows. And don't forget to look up in the big stuff!
And since only one is seen as a general rule - it would be natural to assume they're somewhat loners. Another big mistake. We only see the one they wish to show - and just like the ape families, and just like the human families - both are very social creatures. There are a few exceptions in each, but the bulk like and prefer contact with others, and it helps by sharing the workload/tasks that working together provides.
Counter-intuitive to be sure. But that's our fault.