What's my problem?

Part of the hostility is coming from having to tell you over and over what makes these cars sell, but you have your own justifications for why these guys are wrong or why it shouldn't matter that much.
Some people like purple paint on their house, and some know that purple paint will make the house harder to sell.
It makes ZERO difference if you like the engine bay the way it is, or made that decision on purpose because buyers don't like it.

Same with the Craigslist ad.
It would be nice if the only person that contacted you, looked at it, or asked questions was the one person that was actually going to buy it.
That isn't the way it works unfortunately.
That's kind of like saying you are starving to death but only want catfish to bite the worm, and won't listen to people telling you ANY fish will keep you from starving.

You want to be right, or do you want to sell the car?