IIUC it's not the model of buying domains from registrars which stinks of crap, it's the buying from registrars by domain squatters who then flip them for a profit having provided zero value that bears a whiff of shite. These ticket scalpers of the internet who contribute nothing can well and truly fuck straight off.
Speculators provide time-allocation of resources. They're pretty critical part of market dynamics to help resources get sold and developed when they are valued most. That is, they prevent domains from being captured prematurely for lower value use. Society profits immensely from their contribution.
Hey I get it, we all gotta sleep at night. Tell yourself whatever you like to get them zzz's. As far as ticket scalpers and domain resellers stand, my assessment stands: they are bottom feeding zeros providing nothing of value and they can fuck off into the sun.