I like decomp, but it makes me nervous. Like how safe is it to decompile a game and publish it to like github with all the symbols, addresses, etc..

Quite safe in practice, even Nintendo games have had no issues. GTA 3 / Vice City decompilers did get sued though, but IIRC mainly because they did not comply with DMCA requests at all.

The risk is low assuming you respect a potential take down notice that comes in.