Indeed. You can have a Facebook account and just... Not use it unless you need it for something. All the benefits of the 'I deleted Facebook' crowd without the downsides.
Facebook will still learn which websites you visit (provided they have the "like" widget) and what articles you read on the NYT, unless you use a good tracking blocker.
Additionally, on macOS you can use Fluid.app to create a Facebook-only browser with separate cookies, etc. Keeps it isolated from the general web. Do the same for google apps.
Good for them, but they seem to mistake it as some sort of universal lifehack.