I do agree with comrade Odessa200 that the Vostok recommended service interval (if one reads it like that) of 10 years, especially when in daily use, is a bit .... well perhaps one can say "pushing the boundaries of a sensibly service interval" or is a bit of a product "promotion".
However I do believe that the build quality of the Vostok movement * is good enough to serve a period of well over 10 years when serviced and very likely also when not serviced.
There are plenty of Vostoks from the Soviet times, 25+ years old, never seen a service since they left the factory and still do run. It is clear that they are in desperate need of a service, but I still have to see the very first 24xx which, despite having never had a service, has been worn down beyond simple repair. Perhaps others have, but I haven't.
It is well known that through time experiments have been made with different materials and it may well be that the very modern movements are of lesser quality
* As for Vostok I can only judge the Soviet movements (24xx; 80's' - 90's) since those are the ones I mostly work on. The older Vostok 22xx I've done were still fine too.
Assume what you are saying is the correct interpretation; about 10 years for a say $70 watch is about $7 per year ....... if you see the watch as a "one-off" and disposal item, that still seems a very good deal to me
Anyway; interesting remark and food for thought