I commend you for voicing this opinion and disagree with you with every fiber of my being.
Why introduce astral projection instead of having Luke become one with the Force and then stall Kylo? The outcome is the same, but it doesn’t require the introduction of a new Force power and doesn’t imply that Luke used up his life force or whatever, which is also a completely new thing in the Star Wars universe. Having Luke’s Force ghost instead aligns with Episode IV when Obi Wan says that when he joins the Force he’ll be more powerful than Vader can possibly imagine.
The Battle of Athens is one such occasion. The outcome can’t be considered 100% positive, but what future ever is? I should mention that the Second Amendment exists as the last resort, a sort of “break glass in case of emergency”. That those weapons are also useful in everyday life in a dangerous world is a side effect, but in the end, civilian weapons exist in case a despot/party gains enough power and starts to wield it against the citizenry, as at least one presidential candidate has promised to do if re-elected. It’s incumbent on all of us to vote our conscience, but also to be ready to respond effectively in case voting doesn’t do enough.