As much as I hate GitHub Actions, I prefer it over Jenkins and others, because it is right there. I don't need to go and maintain my own servers, or even talk to a 3rd party to host the services.

Like many things, the tool people reach for is the one that's in the box... As opposed to a trip to the hardware store, getting distracted for a few hours, coming back home and no longer in the mood to work on your project/choore.