To answer your questions (I don't think it's what you wanted, but people will scratch their heads after reading them):

On reality, they are hiring because they have a lot of (investment) money. They need a lot of hardware, but they also need people to manage the hardware.

On an alternative reality where their products do what they claim, they would also hire, because people working there would be able to replace lots of people working in other jobs, and so their workers would be way more valuable than the average one, and everybody would want to buy what they create.

Journalists don't care about it because whatever they choose to believe or being paid to "believe", it's the natural way things happen.