Right, and those can be anticipated and mitigated. Options:
home warranty - essentially forces you to save for larger expenses
be pessimistic about expected lifetimes - i.e. only assume your appliances will live while they’re under warranty (most can last more than double that with proper maintenance)
forego most or all other savings until you can pay for the highest ticket item in cash - it’s extremely unlikely that everything will fail at once
If something truly out of the blue comes up, you’re usually in appliance warranty or home owners insurance claim territory. The vast majority of the time, “unexpected” expenses could’ve been planned for, but the individual didn’t do their due diligence. A 20 year old furnace going out isn’t an emergency, that’s its expected lifetime (and with maintenance, a high quality furnace can last double that).
Owning a home is expensive, and so is renting. If you’re paying more owning a home on average vs renting for the same size of place (after, say, 6 years or so), you’re doing something seriously wrong.