As an historic note with little relevance to your point, this wasn't solved until the US entered the second world war and the government built a bunch of them for heavy bombers, which were later converted into civilian use.
That's why the flying boats, like the Boeing 314 Clipper, were the go-to plane for long distance travel pre-war. There's no need for a runway when you can land and take off on water.
"lack of mechanics"
This isn't really true. The early cars could be fixed by most any mechanic or blacksmith. Remember, farm equipment was already pretty mechanically complicated.
Hence "As an historic note with little relevance to your point".
At best, treat it as comment about how hard it is to think what detractors to X might have said before X became wide-spread. I believe your example of 'lack of mechanics' is poorly chosen; akin to saying 'My biggest gripe with hearing about fully autonomous cars is that they will be so expensive that only the five richest kings of Europe would own them.'
As a real-world examples I think are better, 'My biggest gripe with hearing about telephony is there won't be enough operators to handle the number of calls.' 'My biggest gripe with hearing about computers is that they are too bulky.' 'My biggest gripe with television is I'm at work when my favorite show is on.'
My biggest gripe about hearing about the invention of the automobile is the lack of mechanics and gas stations.
My biggest gripe about hearing about the invention of the internet is the lack of home computer ownership.
etc. etc.