cuz those are free from problems... Friends Model S has had 3 motor replacements in 5 years. Granted, he's not doing the replacements and the first two didn't cost anything. My local pepboys has been certified as a tesla repair shop and every day there are over half of dozen of them sitting in the lot, but yes, they have far fewer mechanical parts and therefor should be less maintenance.
Not problem free, no. But at least routine maintenance and normal wear and tear are substantially reduced. On my Focus EV, I've done over 50,000 miles with zero repairs and just tire replacements. I've put a little under 100,000 on my Expedition since purchasing it. It's had a head gasket, throttle body, brakes, plugs x 2, and a manifold that needs replacement. All of those were done by me, with the exception of the head gasket. It's thrown P0430 and P019 codes, which required time to troubleshoot. The head gasket was over 3K (covered by extended warranty) and the manifold will likely run that amount as well. My daughter's Altima is leaking oil from the cooler and power steering fluid from a bad gasket. It will need a CVT fluid change soon. ICE vehicles just have more things to go wrong. The EVs just have less shit to break, and the parts that are subject to normal wear, like bearings and struts, are the easier maintenance items.