Um... You can get both a 13" and 15" Mac laptop with integrated graphics. The addition of integrated graphics in the 15" form factor was one of the things I liked about the last refresh. Even if you get a higher end 15" model or the 17" model you still get integrated graphics in addition to the discrete graphics so while you can't avoid the cost of the discrete graphics on these higher end systems you don't need to suffer the battery penalty discrete graphics brings. The discrete graphics adds maybe $100 to the cost of the machines it's on and at $3200 AUD for the cheapest Mac laptop with discrete graphics it's hardly an unbearable cost if you decide you don't need it.
Compared to the PC world, Apple certainly does have an anaemic product line but you can't force them to make a computer just for you. Apple makes premium machines so they're always going to cost more than merely average machines. If you don't demand a premium product, look elsewhere. Personally, I find the PC world to be a sea of bad to mediocre products. Sure they're cheap but I don't want a fat machine, or a machine that flexes when I pick it up, or something that's unreasonably heavy. Perhaps there are premium PCs out there but I haven't seen them for sale around here.