My anecdotal evidence is the opposite. But I do not trust that to judge about reliability in general. The prices for used Macs are consistently higher even after 4-6 years than for comparable PC and this is much better statement about quality.
1. The MacOS premium. It's impractical to run MacOS on anything else.
2. Status symbol.
Anecdotally, I see a lot of people outside of HN comparing their experiences with the quality of a $1200+ USD Macbook to ~$500 USD laptops of other OEMs. Of course the Macbook wins over things half its price.
Personally I've had great experiences with Thinkpads and Latitudes, which have held up great and are very easy to repair or upgrade.
Apple makes amazing things. I would love something as slick as a Mac laptop,but I can't make myself get one.