I don't know if I agree with this. With natural products the source of the material does affect quality.
Agreed. At the same time, though, it may be very difficult for somebody outside the industry to make sweeping quality assessments based on country of origin.
Complaining about the leather sourced from India is a bit like saying
"I don't buy Twinings tea anymore ever since I found out they source their tea from India. I thought I was buying English tea!"
BTW, it's rather surprising how large the Indian leather industry is, seeing how Hindus are the most populous and influential segment of the population and cows are supposedly sacred to them.