Whether it be electronics, automobiles or medical equipment, the manufacturers should not be able to horde “oem” parts, render your stuff useless if you repair it with aftermarket parts, or hide schematics of their products.
Summary video by Marques Brownlee
Great channel covering and advocating right to repair, Lewis Rossman
Basic blender went bad (motor ran but spindle wasn't rotating). I wanted to disassemble to see if it could be repaired. Three of the four screws were Phillips head. I had to cut the casing open in order to discover why I couldn't unscrew the fourth. It was a slotted spanner.
Oh, so you're certain that OP even tried to lookup a service manual, and that there's not one available? Endoscope and the right screwdriver together are still cheaper than a new blender.
Ever heard of a teardown? Go watch some on Youtube or Peertube. You won't find many that fail to disclose the manufacturer, that break the plastics, nor will you find many, if any, blenders that use a more common screw-head for the motor shaft.
... but sure, pontificate on behalf of targetted rage-bait that actively discredits this community versus anyone with an ounce of experience or common sense.
I deal with worse than this Blender on a daily basis, or rather I might, if the internals of the devices I work with weren't behind literal lock-and-key, and yet, NONE of them are left un-supervised with your standard schmuck, their CHILDREN and pets.
HIDDEN screws, glues, DRM and fragile tabs are indeed a real problem. They are major reasons we need service manuals and "guitar pics" and all sorts of other non-sense that inspired the Right-to-Repair movement. OP's Blender has NONE of those things.