That's the fun with data validation.

NO burned DVD/CD is error free. There are always some bad spots.
But DVD and CD both have a good error correction system. Only when the amount of badly burned data is too much, the CD/DVD is indeed "bad".

Nero validation apparently checks for all the bad spots and does not take the error correction mechanism into account. So I expect that each and every burned CD/DVD will "fail" Nero's validation.

If you want to test the DVD, you'll have to batch unzip the complete contents to a temporary folder. I even could write a PoserPython script that could check an entire DVD by extracting each individual zip file to a temp folder, (optionally) compare the extracted files with the originals, logging everything, and finally clearing up the temp folder.
Got too many projects going on to give that script a shot, I'm sorry...

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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