I used to run my own email for years. Started on qmail, postfix+dovecot. Anti-spam (spamassassin for a while, rspamd), spf+dkim+dmarc, srs, arc-signing for forwards. All kinds of other tools, even wrote some of my own. I’ve learned a lot and pretty much ran the gamut to be honest.
So all that said, nowadays I just host with mxroute. Bought a lifetime plan. There’s features it doesn’t have but it’s good enough to get emails and a lot easier than self hosting.
I generally recommend finding a host that has the features you want at a price that seems fair. Email is the kind of thing that needs to just always work.
Once you set it up sure, it’s rock solid. Until one day you realize your emails are getting dropped and there’s some new thing you’ve gotta look into. Let somebody else handle it.
It’s all rigged, technically. If you go to a real life casino, slots are certified to pay out some percentage of plays. It’s like, 8%.
If you play craps, roulette - the house always has the edge because there’s more results favorable to them.
The only “casino” game where the house doesn’t have an edge is poker because that’s player against player. The house doesn’t really have a stake in any outcome, they’re just being paid to host the game.