Yes the maintenance schedule is excessive. They do it to protect themselves from claims, both warranty and liability
"No you didn't change the brake seals every two years (plainly excessive) so you didn't follow the "maintenance schedule" so take a hike."
They are not your friend, they are a business and run by accountants and lawyers,they will cover their ass any way they can adding absurd clauses that they know full well very few people will follow.
You could add buried clauses to software agreements saying
17a 2.2 Our executives may have access to your holiday home free of charge any time they wish
and most people will click "Accept" without even reading it.
ps My master cylinder and calliper seals are still functioning fine after 23 years so don't worry that yours will have hardened yet. Though I do change the fluid every few years because it is hygroscopic and will get a lower boiling point over time as well as start to corrode with the absorbed moisture. It's easy enough, just keep adding fresh and squirt it through the bleed nipple till you think it is about flushed.