All this Yoda calling lighting justification talk sounds to me like mental gymnastics 101. Yoda somehow via the force either creating, influencing, directing, etc. the lightning in TLJ just doesn’t sit right with me whatever the reasoning. Pre-ST force ghosts could not affect the physical world. Suddenly in the ST they can directly influence the force back in the real world.
Sorry but I don’t buy it anymore than I bought the ugly Yoda puppet. I also didn’t buy “crazy yoda” as he wasn’t crazy or unhinged in the OT, just a little eccentric and put on a crazy act to either test Luke in TESB or make himself seem harmless while checking out who this stranger was that just crash landed in his backyard.