I've been running my own bitcoin node for a while now and got curious about how one would solo mine to their own node which is what i assumed was the norm back in the day and is the most decentralized for the network but everyone now uses pools even for solo mining.
I even recently bought an old crappy S9 from eBay to play around with this idea but when i check solo.ckpool.org i saw that the reason it exists is because you cant mine to your own bitcoin core node.
Why is this? is mining to your own node some lost art and how do these pools do it? like how else would they get the mining work anywhere else but the node? could someone please explain this to me?