I recently sold my 14 year-old ICE car, and like 2/3 of the maintenance costs were for things that still would have been present if it had been an EV.
So, either you were really lucky with ICE or extremely unlucky with EVs.
I don't see that I was especially lucky with the ICE components, I did all the scheduled maintenance plus some other misc things (water pump x2, bad transmission bushing, etc.) (Oil and filters just don't add up to all that much - I followed the maintenance schedule using high mileage synthetic and high-mileage filters and the total cost was under $100/year at a dealership.)
I also don't see that I was especially unlucky with the non-ICE components, I've got a 13-year sample size of steady, unremarkable maintenance to tires, paint, brakes (these always corroded from salt before they wore down, so no real EV savings to be had on brakes), misc trim pieces, etc. Looking at my Excel sheet of maintenance, I'd expect these costs to be higher on nearly any EV, just because the ICE was a cheap econobox with cheap parts (e.g. tires were small, TPMS sensors were cheap, only 4 lug nuts, etc.), and any newer vehicle is going to have more parts that need replacement/repair, and those parts are going to be more expensive.
2. The only thing left are tires and washer fluid. I’m not convinced that these make up 2/3 maintenance costs. All of the fluids — oil, coolant, transmission — plus components that wear down/need replacing (alternator, transmission) — there’s no way these are only 1/3 of all maintenance.
2. Oil/coolant/transmission just don’t add up to much. Oil was $100/year, there was like one other fluid-related and one transmission related service over 13 years. There are many things other than tires and washer fluids (though tires are a fairly large line item) checking my spreadsheet for non-ICE-specific costs, there’s paint maintenance, general cleaning costs, a seatbelt receptacle, a cruise control buttons, roof exterior rubber trim, a headrest, a window switch, washer fluid spray nozzles, lug nuts, wiper blades, shocks, struts, door weather stripping, rivets holding the front plastic splashguard on, headlight bulbs, headlight buffing, washer fluid reservoir cap, replacement speaker, turn signal switch, windshield repair, backup light switch.
My costs lines up with much of the available data, e.g. see https://www.motortrend.com/news/government-ev-ice-maintenanc...
“According to the office, internal-combustion-engine-powered (ICE) vehicles cost $0.101 per mile to maintain. [..] Full battery electric vehicles, on the other hand, are much, much less expensive to run and maintain, coming in at just $0.061 per mile.”
That lines up fairly closely to my experience - their EVs still have about 60% of the maintenance costs of ICE vehicles.
In my somewhat limited experience, Japanese cars often need brakes around the 40k mark, and German cars go more like 60k.