Well, one reason people do that is because of the ridiculous things everybody has been saying for years - like how electric cars are inherently way more reliable than ICE vehicles.

It's like how certain people get enraged over short sellers influencing stock prices, and somehow it doesn't occur to them that way more information is distorted in favor of public companies.

And sure, there's no reason to think it was a special unit, but that's the best case, and it's not rational to assume the most likely case is the best.

As in any test methodology, if your random sample has problems, it's a bad sign for failure rates for the batch.