Sorry I know this sounds mean. But the other link is you used both. Both your disks. Doubt that is the problem, but it is a link. Unless the environment you used both is particularly dusty/sandy
The discs I used were brand new spotless discs. It didn't matter the quality of the disc. It was just a defective drive.
No optical drive should be making a grinding noise ever. it was a new console, new disc and still the same problem. I tried different discs as well.
All my consoles are kept very clean
I see what you're saying but I tried ruling out that maybe the disc was dirty but the replacement console read just fine and no grinding.
Also, the new Xbox one x I just bought has no grinding noise so there are definitely others with the issue. Bad optical drives are a common issue on Xbox One's.
Not trying to shit on the Xbox One, I just have had some bad experiences with them.