We can agree to disagree about that. The difference between a live and a synthesized performance of the same piece is usually pretty obvious within 30 seconds IMO - or within 10 seconds for a badly made synthesis. That is true whether the sample library cost $100 or $10,000.
But if people stop trying to imitate live performances and do something original with a sample library, that’s a different story. The only problem is that most people don’t have much “originality” in them!