Uh..no...
He's not that far off.
https://www.currentautomotive.com/how-much-does-a-tesla-model-3-battery-replacement-cost/
“He’s not that far off.”
He is way off. You don’t need to replace the battery every 100k miles. Besides, as your article says the batteries are modular. Degraded cells can be replaced as needed at a much lower cost.
Congratulations! You managed to find ONE outlier! From your link:
And in the more than two decades of combined experience our team has been working with electric vehicles at Tesla and Current Automotive, this was the first time we’ve come across a Tesla battery replacement that required the owner to cover the costs out of pocket.