It depends on how many miles it has driven and how much other maintenance the car has had. It's a big expense but a battery dying is probably comparable to a timing belt breaking, those aren't cheap either and thats not even for luxury cars...
parts and labour is $15,000 to $22,000 from all sources I can find.
Heres one: https://www.recurrentauto.com/research/tesla-battery-replace...
And when they do, it's usually just a few cells that need replacing. In Europe, there are specialized third party repair shops that can do it a fraction of the cost of a new battery: https://www.smart-emotion.de/article/431-cell-replacement-at...
Lots of real world data shows that the TCO of EVs is much lower - fewer moving parts, less complexity, less maintenance.
but, sure, fair enough.