That may be true, I used to be an iPhone Xs user before my Pixel 7, and it used to drive me crazy seeing blue WiFi icon turning white, as opposed to turning the module off completely in the settings, when the icon becomes transparent.
It is nitpicking though, for sure. I have tons of other, more significant complaints about iOS, I was just clarifying what it may have been that the other person was complaining about.
Edit: Moreover, until you deliberately tell your phone to NOT automatically turn on WiFi after an hour or two, it will decide for itself that the time has come and it can drain your battery now.