This is exactly why I have never trusted wifi from day one. I still use hard-wired networking and always will. Did I have to make holes in walls? Yes. Did I have to crawl through the attic? Yes. Did I get tired and sweaty? Yes, but my network is secure! :-)
I use MAC address filtering in addition to password for the wifi. If your machine MAC address isn’t on the list, it never even gets a chance to enter a password.
Until you tie it to the internet - at which point you are vulnerable. Just like Wep/WAP - it’s just the time it takes to get through and the skill level required that is the question.