It's almost as if the markets are intentionally structured such that it's easy to place a long-term bet that asset prices will rise, but relatively more difficult to bet the converse :0
That's exactly what I mean by "relatively more difficult."
There is no premium if you buy and hold, in fact that's the baseline situation from which the premium is calculated. And buy-and-hold works for arbitrary timescales, while even long term puts come only in certain flavors.
That starts to seem a lot like structurally built-in upward pressure on prices.