What you have heard is backwards. Asian movements (not including Asian-made ETAs, which are close in quality to their Swiss-made counterparts) tend to be cheaply made with parts that are difficult, at best, to find. In general, most basic mechanical movements are functionally the same, so there is little difference in the difficulty in repairing 1 brand over another.
The movements in rep watches are either used or unserviced, which is why it is a good idea to have the watch professionally overhauled upon arrival (or soon thereafter), if you want to be able to rely on it. Most mechanical watches require regular servicing every 5-7 years, regardless of the brand or source country.