I guess if you have a crappy brand of hybrid that might be true. I'm 8 years into owning a Toyota hybrid and I've done nothing but once a year oil changes, one set of tires, and just did my first set of brake pads. I guess cabin air filters and other regular consumables too. There's actually added reliability in the fact that the engines have no belts or mechanical driven accessories, which are common failure points, because the mechanical engine isn't always running to drive those accessories. The electric controlled accessories are overall more reliable with less moving parts to fail. Being friends with a recently retired Toyota mechanic he said they didn't often see the hybrids for anything but routine stuff. I suppose there are exceptions to this, and there are certainly far shittier car brands than Toyota making hybrids too.