I don't think its fair to say that it's a bias against Walmart or that if it was bought at a lqs I'd be singing a different tune.
A lot of people don't realize there is an extreme difference in quality in trade tools. I can go tractor supply and but a set of screwdrivers for $20 and maybe they might last a few months before going to crap or spend the extra and get snap on tools that I know are too quality and will last a long time and have a guarantee.
For me it comes down to quality. You don't get the same type of quality nowadays with big box stores as you get from machine dealer.