You might not familiar with how the internet archive does the book lending. The book is actually drm-protected and can only be opened with adobe software, which will expire in just a few days, rendering the file useless. What the internet archive did was simply allowing more people to borrow the same book during pandemic instead of only allowing one person at a time. The lent books still expire after a few days. It’s not like the internet archive was suddenly turn into LibGen and distributing unlocked pdf to anyone. Anyone who familiar with LibGen would not bother borrowing from the internet archive digital library. The issue is simply blown up out of proportion by publishers.