Rather than seeing EotE as a 60 dollar game that you have to buy a 15 dollar dice set for separately, look at it as a 75 dollar game that gives you the option of only spending 60 dollars by using online dice rollers, regular dice conversion tables, or print out dice covers to convert classic dice into EotE dice. Selling the dice separately is a really smart idea, honestly. It makes it easier to purchase exactly what you want.
This way, if someone wanted just the rulebook and not the dice, either because they prefer the apps or because they already have an abundance for some reason or another, they can buy it without accruing even more dice. But, if someone wants the dice without the book, that's an option as well. If you want dice "included" in the purchase of the book, then it is as simple as ordering a set of dice with the book! It is really not nearly as big of a deal as a lot of people are making it out to be.