Those are some fair points and you're right it's a vague idea. Liberal is an adjective that's applied across the political spectrum so it requires people to be specific about what they mean. The term liberal can be contradictory but classical and social liberalisms are two very different things and need to be treated as such.

Most of Lemmy (OP included in this case) tend to refer to social, centre/centre left liberals when they talk about liberals. Here in Aus, and in a lot of other places it more refers to the classical centre right/right laissez-faire RWNJ definition of liberal.