yes, used ev's are generally undervalued at the perceived or potential loss of battery. Not sure that they (EV's in general) have been in service quite long enough to have a well established/known rate of failure, yet.
however I posit that many/most are made up of essentially standardized (at least for a particular manufacturer) cells that are grouped together.
as battery advances are made, it will become cheaper and easier to replace failing cells or entire packs as needed.
In the mean time, the lower cost of used EV's will increasingly spur the less EV inclined to consider and EV/hybrid over traditional ICE only.
I can only speak for myself, I was not actively looking at EV's or hybrids to replace my GTI, however a nearby dealership always had a constant supply of lease return chevy volts that I would drive by several times a week.
I have always been in intrigued by Tesla's, but realize I will probably never afford one. Curiosity got the best of me one afternoon, and I was impressed enough to do a little more research and few more test drives that I ended up with a loaded 3 year old volt, under 30k miles, with a 6? year/120k mile full extended warranty for under 15k.
By no means is the volt perfect, but I really like it. And as you can probably understand I have become quite the EV convert (obviously mine is not a pure EV, but EV with gas range extender).
Since then, the gen2 volt and bolt (and others) have improved and expanded on the available ev platforms.
Again, I don't think anyone is saying that EV is the only solution for everyone and everything, right here right now.
But I dare anyone to take the pepsi challenge, so to speak, if you have an opportunity to drive an EV or PHEV (of any make/model), I think most people will walk away more impressed than not. Even if the particular vehicle that is driven doesn't fit their particular needs or situation.