Honestly, wired networking can be less secure, depending on your threat model. Not everyone lives in some kind of a physical fortress; breaking into someone's house is usually a simple matter of some lock picks that you can buy off the Internet, then compromising the wired network just requires installing an interceptor, not to mention stuff like hardware keyloggers. The truly paranoid user needs to check all their wired connections before each and every use, which few people do. They will need to seal the cases of each of their machines with some kind of tamper-evident seal, with transparent cases to ensure that nothing has been added internally with countermeasures taken against the tamper-evident seal, including the cases on the video cameras that they have set up to try and catch would-be intruders.

The point remains, people either generally feel safe in their homes, or they don't. If you do, then honestly a lot of these security measures are just overkill. If you don't, then you should deal with the root cause instead of its symptoms.