If it costs money its adds to the total cost of ownership, whether its preventative maintenance or unscheduled break fix.

The only difference with preventative is its scheduled so you can organize the work to fit your schedule without much inconvenience.

At the end of the day you need to factor in the entire cost of the car over its lifespan and figure out at what distance the cost of ownership crosses over from ICE being cheaper to EV being cheaper.

This includes repairs, fuel/electricity, insurance, opportunity cost of not having the price difference to invest, etc.