It's a longstanding management principle, so old that people may not even say it explicitly any more, which states "focus on your core competencies," the corollary of which is "outsource anything that is not a core competency."

I can see how it makes sense for companies, because money is "only money" but an ongoing operational distraction can be much more costly, as in, it can be detrimental to the success of the overall business.

Did you build your own house using tools that you forged from iron-rich ore yourself? Did you grow your own wheat to make bread for your lunchtime sandwich today?

There's a reason most people pay other people to do these things for them.