People on hacker news are smart, but not about everything. It takes some effort to really understand our central bank dollar based financial system. It's takes effort to understand Bitcoin. Most of us here are focused on other things and only take a cursory look at Bitcoin and dismiss it's "slow transaction times" (which are actually incredibly fast settlement times), high energy use (which actually uses marginal energy that would otherwise be wasted), and conclude "this is not worth my time to understand, and I wish everyone would just shut up about it."