I think you have a problem with reading comprehension.

I said who cares if google throws something to spam, that’s not my problem, that’s google and recepients problem. I’m running my own email server, I’ve been running corporate mailservers and personal before. You don’t control other peoples infrastructure and google is by far not the worst gatekeeper in email world, insane whitelist configurations, spamhaus, whatever weirdness like recieving only from specific subdomains. Running email isn’t hard, just stop being a perfectionist about some metric that shouldn’t be measured to start with.