Here's the issue as I see it:
EVs fundamentally change the economics of maintenance. That's because they have far fewer moving parts and are much simpler mechanically. So much so, that Teslas (for example) don't have any servicing schedule - you get free updates with an occasional inspection recommended.
Now, traditional manufacturers make most of their money out of service and maintenance and so do the dealers. That's because you get payments every year and they can mark up parts and labour hugely (you are locked in), plus new car pricing is very competitive, squeezing margins.
So, when the likes of MG (and many others) switch over to EVs, they think "let's charge the same for service as we did before or we'll lose most of our profits, the customer won't know any better". Then we get £400-500 3 year servicing plans, which are a nonsense.
EVs really only need tyres as a regular item. Brakes are used far less (pads and discs last years and years) and even in an ICE vehicle, brake fluid only needs changing if contaminated, so dealers should be doing a quick inspection and test, not trying to change it out every 2 years for £100 a pop (VAG: that's you). AC only needs servicing if it isn't working properly, it doesn't need a recharge when it already works. Cambelts used to last 80,000-100,000 miles, now it is 40,000-50,000 (just in case!). What next? Change them every year???!
I am really happy to pay to maintain my vehicle properly, but I object to being scammed by dealers or manufacturers who want to rip me off for things that are not needed.