EV batteries have many more cells in series, for example my car is 104S, and 800V cars have (obviously) more than 200 cells in series.
And the longevity of car batteries isn’t about wear being distributed “evenly” (a healthy battery can’t really wear “unevenly”, you always load all cells at once). EVs take care of their batteries, they cool them, heat them, balance them periodically, and they don’t actually pull that much power from them. They also keep the cells within pretty conservative voltage limits.