That's not entirely true, it really depends where you live I guess.
I looked into both options a while ago, as I would much rather go the pc route, but for me the cheapest option for building a new gaming pc, with specs that wouldn't run pcars at max settings mind you, was over $1700aud. Compare that to $450 for a ps4, and a tad under $500 for a t300. Not to mention, I would want to upgrade my dfgt either way, as the ffb is pathetic, the pedals are fisher price quality and are failing (potentiometers play up all the time), and the wheel spins so slowly it's near impossible to drift with it. It's laughably unrealistic compared to the fanatec stuff I've used, and from all accounts the thrustmaster gear is even better (bar fanatec csw, but I haven't used one of those).
Fact is, for under $1000aud, which is what I'll get a brand new ps4 and t300 for, I couldn't get a good enough pc to run pcars unless I went for a second hand one, and if I did that I could be unleashing a whole world of problems onto myself.
Edit* I'll also add that I'm not keen on playing on a tiny pc monitor, and graphics cards with hdmi outputs are expensive, as are triple screen set ups.