If batteries are actually lasting, then it's easy to counter the propaganda. Manufacturers simply need to make sure batteries are replaceable and offer guarantees that they'll be replaced on the manufacturer's dime if they degrade.
There are also some elements of EV ownership where they require some TLC, like not overcharging them when doing mostly local journeys, not using rapid charging more than necessary etc. If manufacturers were carrying the can it would be easy to let these things go out of the window.
Also, consumers currently are the ones taking on liability in adopting new technologies. That's one reason why EV adoption has been a gradual thing. Offer certainty to consumers and they'll look at what they have to gain instead of focusing on what they might lose.
Obliging companies to make repairable products? Removing their right to lock everyone into disposability and overconsumption? And even worse - trimming a sliver of their profits? Damn right, buddy: we can't be having that.
But yes, making things repairable is really important. And, I certainly have concerns that the danger of high voltage batteries will soon be used to introduce so much regulatory burden that it becomes impossible for individuals and small companies to repair them.