I'm going to step out on a limb and speculate that modern production methods have narrowed the gap between the low end and high end big volume production rifles in terms of quality.
Either way, lemons can/do slip through. Sometimes these could be spotted at the factory or gun store. If you got one of those, perhaps you should've looked more closely. Others don't show up until you shoot them. This even occurs with custom rifles
sadly enough. In which case, it's simply a question as to what the mfg/smith is going to do about it.
Fine rifles still require extra TLC to make a difference which is reflected in the price tag.
Factory rifles just don't do it for me any more. I started building my own so that I can have them made to my personal taste/specs.