No, 'we' don't.
It's perfectly possible when able bodied and with able bodied children to;
Walk
Cycle
Walk to bus stops
Stand waiting at bus stops
Catch buses
Sit or stand on buses
Get off at stops considerable distances away and change buses or walk to destinations
Get to train stations
Get onto platforms via multiple flights of stairs
Get onto trains
Stand for 4 hours or sit on seats on trains. Or sit on floors outside the toilets because the last three trains were cancelled, all seat reservations have been cancelled and people's fridge-sized suitcases appear to need their own seats and the guard can't even get down the aisles to check tickets, much less get to be told there are 15 suitcases taking up seats in order to tell them to shift them
Get off at the correct stop and manage to physically get off onto platforms even when there's a huge gap (like Clapham Junction)
Get out of stations via multiple flights of stairs
Walk to tube stations
Walk considerable distance through tube stations (like from London Bridge to the different lines)
Stand on tubes
Get off at the correct station
Navigate around tube stations and interchanges to leave or change tube
Deal with massive flights of stairs or out of order escalators (like Embankment, Camden Town, Upper Holloway or on one spectacularly awful night, around Paddington with no lifts, no escalators, huge distances between each and multiple changes of platform all requiring further stairs and distances to walk whilst trying to get connections)
Carry stuff
Deal with overcrowded stations with nowhere to sit
Manage in the event of cancellations
Climb off a broken down train onto the track, walk along it to the nearest station and make alternative arrangements to get home
And then go and wait for another bus.
Not something feasible with spinal pain, a likelihood of fainting, seizures, poor balance, a need for walking aids, exhaustion, other pain, a leg that's in a brace, somebody that could become extremely distressed and panic or lash out in terror or be unable to see or maybe hear emergency announcements or changes.
I can't even cope with walking round the corner to stand for an indefinite period waiting for a bus that is likely to be full to overcrowding with teenagers if it even stops. And the £15 each way to work by Uber is extortionate. When they accept the fare and don't bounce the booking three times, that is.