Definitely.
As with all broadcasting, the lower levels of the over-the-air protocol must be insecure. Anyone can receive what you transmit. What matters is whether the upper levels of the over-the-air protocol are secure.
Of course those upper levels of the protocol do actually have to be secure. If you look at the two most widely used types of wireless network communication - WiFi and the cellular mobile network - both of them have had iterations of release / oops / upgrade.
You can improve things by running further secure protocols over the top of the over-the-air protocol (e.g. your vanilla SSL/TLS) but that too has had those same iterations.
So things never seem to stand still …