It's not so much of a problem for brand new models but there are still many older ones that suffer from battery failure and degradation outside of warranty.

Look up Lithium Iron phosphate batteries. They will outlive the car they're in even better than the lithium ion ones that are the majority at the moment. Those lithium ion batteries will also outlive the vehicle they're in btw. The only ones that won't are Leaf batteries because either they're an old chemistry or because nissan cheaper out and didn't put a coolant loop in them.

Do all cars use LiFePO4? I thought most used Lithium Cobalt Oxide because it has a higher energy density, that's what's used in smartphones and laptops. Using LiFePO4 means reducing range and increasing weight. Ditto for Sodium Ion batteries.

All Lithium Cobalt batteries need replacing after about 8 years of regular usage. That's not great given we still see 20 year old cars in use. I guess there are steps you can take to reduce this, like not charging to 100%, but they all fail sooner or later. All this rapid charging stuff doesn't exactly help either.

You're going to have to come up with some serious evidence if you want to say car batteries are not a problem for current gen EVs. Maybe with better Sodium Ion tech they can be extended in lifespan and reduced in cost enough to be practical for most people, but it's still going to require infrastructure overhaul and won't be applicable everywhere.