Gog is objectively giving you more value for your money
What value do they give you exactly?
The games are mostly priced the same, they don’t have integrated modding support, no input remapping, no remote play, no in-home streaming, no steamcmd for server operators, no VR client, no Linux client and no Steam Deck support.
The only thing they do give you is no DRM, but nothing stops a developer from adding a DRM-free game on Steam.