Actually, it's to go after anyone they don't like. I suspect that Facebook and Google are better equiped to handle "go after" than you are.
No, they may not want to go after you today, mostly because they probably don't know that you exist but get their attention and things may change.
If you'd been following this whole mess you'd know it's just a typical EU nonsense legislation that no-one knows how to implement and the UK is once again implementing it too harshly in law but giving it absolutely no teeth by creating a practically powerless and massively underfunded enforcement vehicle while our EU brethren quietly ignore it.
No big conspiracy, just your bog standard bureaucratic incompetence from the EU.
What I'm saying is that it's clear to everyone involved that the authorities (EU or UK or whatever) will never be able to enforce this law except for the largest targets, in the same way as they'll never go after anyone coupling their OS and browser except if it's as big as Microsoft.