I would still recommend turning wifi off when leaving home for privacy reasons (which can easily be automated). The process to identify if a network is trusted or not requires a handshake. So leaving wifi on makes you trackable by the wifi network operators and the apps on your phone with access to your wifi, wether you connect a network or not.
I think that take is short sighted. Because the next obvious step to “no right to online anonymity” is “online anonymity is illegal”, and it’s pretty obvious we’re headed that way. In that case, courts can make it pretty fucking hard to protect your right to privacy.