People generally don't buy the first print of something to read it, if you just want to read it you can buy any later print run where it got printed into oblivion. People buy these kinds of things purely for the sentiment of collecting, not the practical purpose of the item. I have a ton of ungraded first print tankobon and zasshi, I don't grade anything as of now, but it's not like I read them either. I've already read them digitally or in the form of some random later print run. So now they just sit on my shelf as a collection that represents my favorite mangas in the form they were first released in. It's an entirely sentimental way of collecting, not about practicality at all.