The assumption is your type of driving and cost analysis.
Is one leasing their car? Then whatever.
Are you financing your car and if so is it something you trade in or keep?
Are you a performance driver who enjoys driving a car and maybe put it through its paces?
Don't think for a second that since it's a Subaru, that recommended service intervals, marketing, finance programs and cost cutting are mutually exclusive.
To each their own. But from personal experience, machines love maintenance.
It's up to,you to determine the cost ratio.