I mean wifi really doesn't have a good track record for security. It's best defense is probably the short range, making searching for weak targets somewhat difficult. And I'm not even going to talk about spoofing, deauth attacks, etc. Only the newest versions have actually secure crypto, but lots of routers don't even support them (for some reason these secure features are branded as "enterprise"). This is very different from the type of security we've come to expect from high level protocols like SSL, SSH, etc.