Trust is the issue that needs to be resolved with swapping batteries. I'd compare it to a parachute, would you use a parachute packed by some rando you met on the street?

If I go in to swap a battery, what guarantee do I have that the previous user didn't drive it into a rock and puncture a cell? Can I be sure they didn't leave malware in the battery's software?

If all these checks are being done at the swap station, will it still be cost-effective?

Also: Modern EVs use chargers up to 350kW and have 400-500km range. A 15-20 minute break every 500km shouldn't be a dealbreaker for anyone.