It is intentional (the disk has to enabled/disable that function explicitly). DVDs used to be like that, forcing you to go back to advertisement and FBI WARNING. At some point, studios stopped doing that as people were quite unhappy, especially since they were competing against VHS which wasn't rewinding automatically when pressing stop. I find that an increasing number of BD are now supporting "resume" compared to last year.

Bookmarks, when supported, can give you a bit of that function.

See Mojo's signature