To answer the question you asked: No.
The prices are totally logical for what you’re getting. But what to buy doesn’t make sense for the majority of true “homelabbers”. Even the base price of the HL15 at $800 USD doesn’t make sense. I got a Phanteks Enthoo Pro 2 Full Tower and shoved 16 drives into it, some extra cables, a standard ATX power supply… all brand new and you can get the RAM/CPU and other accessories for significantly under than $800 price tag.
I would argue that the HL15 is a great option…for a small business.
This is going to be a “it depends” answer. Based on your location and dealerships (or dealership equivalent) in your area. Lots of Tesla’s and Tesla service centers in California - great experience (at least that’s my experience). In North Dakota? ROFL no.
As for the traditional manufacturers specifically, the higher-end the brand, the more likely you are to have a better service experience. Rolls Royce, BMW, Audi, Porche. But even then it’ll still depend on your local dealer. Just because you spent a lot on a car doesn’t mean the dealers aren’t useless snobs.