"If you believe in determinism then you accept that social forces determine everything you think." No? Why is it so hard for leftists to be radicals (eg mereological nihilists)? Accounts of aggregate collections like "tables" or "social forces" do not cut reality at the joints.
There *can* be heuristic and practical "rule of thumb" style utility to sociological accounts of causation, but to argue that some aggregate entity "capitalism" mechanically determines your consciousness is to be anti-reductionist in the most vulgar and grotesque sense.
The whole point of radicalism is that looking at the actual root dynamics rather than macroscopic abstractions can provide you with a more universal and less historically or contextually contingent picture, thus you're able to exploit breakdowns of the macroscopic account.
The fact that we're probably not a-causal magical actors somehow outside of physics doesn't put hard restrictions on our actions outside of like conservation of energy when viewed at the level of aggregate abstraction necessary to talk of individual humans much less societies.
Can I leverage bits of information I do not have causal access to? No. There physics puts hard boundaries on our actions. But this says nothing about whether some macroscopic aggregate "thing" we handwave as if it were truly real like "society" "determines" our actions.