Some of the issues with quick swapping a battery pack like that is the high voltage cables, cooling lines, etc then there is the installed location, lifting equipment, etc for handling the weight.
And while you might get down to “x” time if everything goes perfect, you sure as hell won’t when things aren’t going perfect and definitely are going to be in a pickle when everything goes to hell. Add in cars that AREN’T in new off the dealer lot condition, having gone through minor collisions, road damage, corrosion from salt and dirt, etc and you will have more issues.
Then there is the whole fact that technology is ever marching on so do you expect the battery swap station to stock a variety of them to meet various generations and form factors? There is no such thing as standardization once product improvements start happening.
And who is going to pay the skilled technician to perform this battery swap? Your jiffy lube grade *expletive deleted*tard can’t fix a sandwhich much less do any skilled work on a car, not when they *expletive deleted*ck up simple oil changes. You don’t want a dumbass doing this kind of work and burning you car down because they didn’t do it right. We can’t get enough people in standard repair fields now, where is this massive workforce to staff every battery swap station going to come from in a nation of people who are lazy as the day is long and don’t want to work?