Ask any mountain biker and they'll give you this conclusion from experience, almost all of us have had some low-speed awkward crash where a helmet was the difference between getting up and walking away or laying in the woods with an open head wound.
If I'm riding on the road do I expect a helmet to help if I'm run over or hit at high speed? Not really. But if someone clips me and I hit the pavement I'd rather something than nothing.
If I'm riding on the road do I expect a helmet to help if I'm run over or hit at high speed? Not really. But if someone clips me and I hit the pavement I'd rather something than nothing.