I thought the claim that Indian pharma is mostly underdosed should be investigated because I purchase from there and am heavily interested in the quality of what I am getting. Some is, of course, but not by much, from what I've seen. The perspective that you might as well get Chinese UGL instead of Indian pharma is foolish, and even dangerous, in my opinion. If you purchase from a reputable Indian pharma manufacturer (like Sun) your chances of getting a highly overdosed tablet is low, but you can see it happen regularly for Chinese UGL. Take a look through the variance testing over at meso sometime and you'll see what I mean.
Let's say your weekly dose of semaglutide is 2.4 mg, but you accidentally took 4.8 mg because your mixture was overdosed. Probably not something you want to do. Same thing with orals.
Moderate under/overdoses of 15-20% are not great, but I'd rather have that than a batch of pills with some of them being highly ovoverdosed.