@Huntnful you have convinced me, having custom rifles makes reloading way easier. You don't have to be a reloading genius to produce great groups and have an accurate rife. Or, maybe a better way to put it, you don't have to "tinker" or "tune" near to the level of a 20-30 year old factory rifle.
That being said, some of the new factory rifles produce some nice groups with very little work up. I've had very good luck with the Tikka CTR in .308 WIN. I'm very interested in the Seekins rifles as I've only heard good things out of those for a factory rifle. Perhaps a Seekins 6 CM is in my future…
Lastly, the groups I'm seeing you post are from cartridges that seem to be "inherently accurate." The newer cartridges are designed to shoot factory ammo well, so…reloading is a snap.
Regarding Hornady's podcast/vlog on the OP's post, their simpleton way of looking at reloading and having good results is totally achievable for the reasons I've mentioned above. I'm guessing the ballistians at Hornady are not shooting $500 Mossburg Patriots. Certainly not on their comp rifles.