Yeah you should remove those unnecessary extras

Most car service centres do this, get more income
They’ll include things like..engine cleaning, interior cleaning, nano clean, oil treatment, fuel treatment and more

I always ask Honda to follow the service guide and the only addition I do is Fully Synthetic oil (personal preference)

Service costs typically <300

Eat some vitamins is okay
Eat too much vitamins is pointless or dangerous

Same concept

Like I said, it’s personal preference
Even I opt for Fully Synthetic, even though it might not be necessary at all, I’m not heavy footed in the slightest