I think i disagree? you do own games on steam: just download them, and you can then launch them without the steam client. At least Paradox/Sid Meiers games work without steam, i did not test others, but i remember playing Dragon Age (the first one) and Mass effect without launching steam (basically we used steam to install those game on my PC, then disconected from my friend account account, and could play a "pirated" game like this)