Why is running your own validator so complex?

I've been trying to stake on raspberry pi but every distribution I've found that runs on ARM has just simply not worked, even after following the tutorial by the letter.

If independent validators are so necessary, why hasn't this process been more simplified? I have basic computer knowledge and a stable internet connection, surely there are more people in like me. If staking was easier and required less skills, esp. with command-line only linux, I'm sure there would be more validators, which is better for the health of ETH2.0, no?