There are plenty of situations in which electric bicycles can be useful. Below are a couple of examples of these situations.
To Explore New Places
If a person wants to easily explore some new places in their country, without having to rely on a car or public transport to get around these areas, they should use an electric bicycle. For a lot of people in this situation, the only alternative to public transport or a car that they might think of using would be a non-motorised bicycle. However, if the areas they want to explore are large, this might not make for an easy or especially enjoyable travel experience. They might find themselves too worn out by, for example, having to cycle across long distances or by having to cycle over many steep hills to appreciate the beautiful scenery or attractions.
If however, a person in this situation gets an electric bike, their journeys around their chosen destinations will be almost as easy as if they were using public transport or travelling by car, as their bike's battery will take over and do much of the cycling for them, during the periods when they're travelling across hilly terrain or when they're simply a bit tired. As such, a person with an electric bicycle might have the energy to explore more parts of a large town or city than if they were using a non-motorised bicycle. This could result in them discovering more hidden gems and having a better time overall during their explorations.
To Ease Into Doing Regular Exercise
If a person is very physically unfit and would like to ease themselves into an exercise routine, then they might find an electric bicycle very helpful. The reason for this is that when a person is on this motorised bicycle, they'll have the option of cycling without pedalling whenever they need a break. If they are feeling energetic and motivated at the beginning of a cycling session, they can pedal vigorously for a while. If after doing this for a few minutes, they then begin to feel exhausted or even faint, they can allow the motor on the bike to take them forward until they're ready to begin pedalling again.
In contrast, if a person like this were on a non-motorised bike or chose to go walking instead of cycling, they would have to bring themselves to a stop, and perhaps find a place to sit and rest for a while, before carrying on with their workout. This might mean that they would need to select a route for their daily exercise session that would ensure that they are in a safe area with outdoor seating at the time when they're likely to get too tired. This, in turn, could limit the areas in which they could do their exercise and possibly make the experience a bit boring.