But they can be part of the infrastructure of that journey including the most cost efficient tickets and accessing the timetables and live tracking online through the apps.
Bus stops often don't have printed timetables or tracking on them. It's common for my DCs' route to skip busses when they're short staffed, then the busses fill up in town and it's not uncommon for them to pass near my DCs' school without stopping, increasing the delays to them.
Having access to that information means my DCs can make an informed choice to walk a few miles instead and give me a heads up that they're running late.
If it's dark after an extra-curricular, that means I can often get to them after work before the bus would come anyway let alone their walk at the other end.
I can't see many adults choosing the tech-free inconvenient options in these situations even if they're capable of managing.
Last year I cut short a run and used the tracking apps to pick the optimal bus stop along their route to avoid standing around wet and cold by walking along the route to a stop with least wait. The apps enabled the most efficient choice. I wouldn't choose to hang around a bus stop with no access to accurate information and it's daft to expect young people to travel with less access to relavant information and communucation than adults. Back in the days of payphones, timetables and small change it was an even playing field for all age groups.
My DCs are already using more independence skill for their bus journey than my default of driving without pretending that we haven't reached the Millenium yet.