Tiny EVs, golf carts, etc. certainly have their limitations but they could be a "gateway drug" for people who are tentative about EVs. Once they experience the convenience of charging at home and an always full tank plus low maintenance, they could get hooked.
Unfortunately, your 'could' just doesn't hold up in the real world. It is the opposite of reality. It may impress 2% but 80% will be permanently discouraged and 18% will hesitate before jumping in (yes, I made up these numbers based on my own rough observations).
Seeing their neighbor driving a 300 mile per charge car that they only, ever drive 30 miles at a time (or 60 or even 100 on occasion) but only drive that car and don't think about it is what gets them hooked. That was when we saw EVs rise in acceptance. It wasn't the Leaf that did it. Only the fanatics (like me) bought the Leaf new.
- Hearing their short-range-EV-driving friend frett over whether they'll be able to go to that stamp collector's meeting across town
- Seeing their short-range-EV-driving friends arrive late to their dinner party because they had to make another stop on their errands making them have to sit at a charger for an hour they hadn't counted on
- Seeing EVs only driving driving 50mph in the slow lane, on 65mph roads, where they and everyone else is driving 70, just so they can get the advertised range they were counting on. This does even more damage when they drive in any lane other than the slow lane.
- Watching their short-range-EV-driving friend go through multiple batteries because of the stress their short-range EV put on the battery by being fully charged and discharged twice per day.
etc: is only going to keep them hooked on gasoline.
Buying a short range EV and having to experience the above, themselves will cause (and has caused) many to do one last drive - back to the dealer to turn it in.
PHEVs may have the gateway ability you describe, however, those with only 20 to 50 miles of EV range (like pretty much all of them) don't really do it either.
Environmentalists are often the worst thing for the environment.