True, but not particularly relevant. You're referring to the Ultralight or Light Sport Aircraft categories.

These are almost entirely for recreation and not for transportation.

The basic rules limit use to VFR (Visual Flight Rules), so daytime only on nice days, limited range, etc. Wonderful for getting up and enjoying the sky, but highly impractical for transportation. We don't see grocery stores ir office/industrial parks installing short airstrip fields for the shoppers or commuters arriving in Ultralights, but they do install bicycle racks. I'd say a bicycle is far more useful in any practical sense.

So yes, in using aircraft for transportation, we're almost entirely in the regime of high regulation and expense.