This is just plainly untrue, the EU is not EFTA and EFTA is not the EU. EFTA is however a bloc that has a very close relationship with the EU. Joining EFTA would require negotiation and it would become a decision for the EFTA members and not the EU. However, there would probably have to be a subsequent renegotiation of the EU-EFTA relationship.
I'm not saying that EFTA is the answer because even EFTA brings many questions of its own but it's just one potential solution amongst many. If we joined Schengen as part of it then it would instantly resolve some parts of the Irish question too.
The whole thing needs a sensible discussion and an acceptance of the reality which is that we're out and that's unfortunately where we are. The alternative is to follow those on here who are moaning about the country burning down but are also still arguing about whether we should have left or not, it's ultimately pointless and boring.