I don't see why. You haven't provided any reason for this other than your insistent assumptions about the needlessness of carts in digital purchases -- but all other digital games stores have them, as well as almost all other ecommerce platforms. If literally all your competition are doing something, and you're not, that's probably meaningful.
>"The absence of a cart implies that EGS are not prioritizing making it easy to purchase games"
Despite your use of quotes, I didn't write that. I said "its absence suggests to me that the store's primary purpose isn't to easily allow humans to purchase games", which is entirely different. Don't put words into others' mouths, or don't feign respect.