If it were not for taxpayers money, ( provided by the state and federal govt.) most of mary lands smaller airports would have closed long ago. Probably true in many other states as well.
This can be said about every tertiary road in the US. Suppose we look at hwy 434 to 120 out of Angel Fire NM. I drove it two years ago. It's a broke down, rutted, bumpy, winding track with no guard rails. I didn't ask for more money to be spent, I didn't complain about the cost of keeping it open. I drove it and for 25 miles didn't see another car anywhere. There are private homes along hwy 120, and those people use that road to get to their homes. It's all part of the infrastructure we agreed to when we filled out a 1040 each year.
But wait - there's more! Highways are funded by a mix of gas tax, state gen funds, and general fed funds. No special 'national highway and roadway trust fund' exists. Now hold on to your hats, cuz there is a specific "airport and airway trust fund". If you think that's weird here's some icing for you. As of now, it has $13 BILLION dollar surplus! Do you know what the feds do with that surplus? Why yes, they do spend it on things not related to aviation, or in some years they count that money as an offset to the fed deficit! Magic!
This gnashing of teeth about the funding on small runways always gets me going. Did you know the feds provide funds for dredging of waterways? Well, sure - that makes sense. The whole country relies on water-bourne traffic, and keeping the sea-lanes open is important. I can groc that too. The good county/city folks in the city of Lake Have-a-screw(Havasu) AZ got wind of this program and applied for funds to have the CO river dredged. Not the whole river mind you, just the part that goes under the
London bridge to a man-made island. No, I ain't kidding, it was approved. I know, because I used to be on the team that got the contract for the dredging back in the 80s. So the first week of Dec, there we were with a 30x75 barge, and a bucket loader, and sure enough, we dredged the canal. I will not report what we found, but the weight of the Aluminum from beer cans would have been worth thousands.