Why did we give up the joy of shopping locally and in-person for convenience?
Time and convenience.
Going to a local independent bookshop, or whatever, is almost always a better experience. Going to specialist shops is almost always a better experience. But Amazon offers everything: and order can be done and dusted from your sofa in one minute, and you don't need to bother figuring out who stocks what you want since Amazon has it. And if you have Prime, you'll have it the next day with zero shipping costs.
Sure, it'll probably be counterfeit but... time and convenience.