Well that's a little condescending.
Care to share what we disagree on?
Not condescending at all. Maybe you should be a little less defensive if you're gonna tell me that my choice of pellets is crap. Just because you've cooked on a pellet grill for 20+ years doesn't make you Obi Wan Kenobi. Opinions are like...
I've been running Traegers for 15 years. Their top end is 450° and the results I get with Costco pellets up to and at max temps works fine for my machine and gets great results and great flavor.
If your running 600° and can't get there because of wood, you're not smoking anyway. You're grilling.
There are garbage pellets out there and you can usually look at the content of the bag and come to that conclusion.
Bear Mt. are out of Cascade Locks. Traeger pellet mill is out of Yoder. The other names you mention, IDK and don't care. I looked up the Kirkland brand of pellets and saw Pit Boss might be the manufacturer, but Kirkland is a PNW company and it would seem weird they weren't using someone closer to home.
All PNW pellets are Alder based pellets, unless you're buying mesquite. They are the strongest tasting smoke.
Any mill that is manufacturing pellets is getting their hardwood within 150-200 miles of their pellet mill because of cost to ship the wood.
Anyway my go to pellets from Costco look no different from either Traeger or Bear Mt in color or substance. They are good quality hardwood.
Another example is buying pellets made from shredded pallets or using heating pellets made from softwoods.
You would have to have a very soft brain to use softwoods. Softwoods are for heating, not eating. Seriously, who would be that dumb?
PS: Smoke tubes have their place in this is world, too.