Some fair points but if like most people you can spend only so much, getting more books for that same much is useful: if you have 15 books of a same subject matter you can rather easily compare them with a quick skim and devote significant effort only to the best ones, or pick only the best parts from each. Otherwise you can easily end up spending weeks on what only when you'll have gained more experience you'll realize was a worthless crappy book.

Even if you're careful in checking the reviews before buying, a lot of technical books have only few, questionable ones, and sometimes there are remarkable books behind them nonetheless!