I don't understand using a pi either. Lots of good old desktop workstations are available for cheaper, and they are more powerful, have more ports and ability to upgrade. Just an overall better choice. I pulled an old machine from storage i5 4th gen. Works great.
Discussion
I think it's just lack of knowledge/experience. There's lots of guides and the Pi looks like the simplest and coolest solution. Once you get the node running then you start going down the personal server rabbit hole though, and the Pi just isn't built for it.