I will admit that ON AVERAGE digital files may be better than analog, because digital sources eliminate this whole issue.
I've not found that to be the case! The fact that there are a lot of poor recordings out there has been going on a long time and digital, if anything, exacerbated that as there are so many more recordings done on laptops and the like with severe budget restraints.
The recording industry wanted digital to happen as the recording cost is so much lower- almost non-existent in many cases. Analog requires that you spend a fair bit on the tape for the multi-channel machine; 1" and 2" tape that only goes for 1/2 hour gets to be a hefty cost in very short order! But if you have a laptop and some cheap microphones you're in business with digital and a lot of such recordings have made their way into the marketplace.