I just looked at a journey from Bricket wood to Luton, shown via St Albans, fair enough the Bit between St Albans Abbey and central is shown as a walk but info is needed about the difficulty of it, approx. one mile with a big climb.
Anyone not studying the offered route carefully before departing could end up in trouble, though there are buses.
There are quite a few walks of this sort offered, it is not that they shouldn't be offered, just that what is offered should be specified.
Maybe test such as, (in this case), involves one mile walk with steep climb.