No, they don't. If they did, they would have..
1) gotten the rear diff oil weight correct(tsb)
2) ecu programming correct the 1st time, not multiple times of screwing it up(recalled multiple times)
3) designed a pcv that would fall apart and destroy the engine(recalled), By the way, the new version is garbage(stuck after 10k).
4) coil packs that couldn't function properly from new(recalled)
Shall I go on? If the engineers knew what they were doing , things like head gasket issues would be a thing of the past. Most of the major components on the family's MY18 have either been TSB-ed, recalled , or involved in law suits to say the least. You might consider or recognize the fact that Subaru NA has a different interests, than most owners of their cars(IE long life span that is reliable with reasonable maintenance costs).