As I also posted on the other thread: this isn't true.
While there’s a big push to book an appointment online and do smaller admin stuff yourself (requesting an ID and driving license), municipalities still have to allow people to book on the spot, or help them on the kiosks available. Actual efficiency depends on the friendliness of the administrative people in question I guess, but it’s absolutely still possible to not have to go online for it.
From the flemish website
(…)Maar waar ze altijd welkom zijn op het gemeentehuis als ze dat wensen.
aka: They’re always still welcome to visit public services in person if they prefer to do that.