alt Hacker NewsThese two statements go hand in hand though. While I do believe companies could take the altruistic take of training people whether or not they stay, and some places do, they're certainly not going to make the effort for someone who has clear markers of being someone who will leave anyway.
That's not how these initiatives are executed, unless the shop is very small. In which case, there's no concrete training offered anyway. If it's large, they don't want to allocate a lot of budget rather than starting a new hiring round. I would say the lack of in-job developer training (or resourcing) is due to multiple factors that results in a consistency rather than specifically targeting individuals.
It's not like I don't speak with ex-coworkers or run into them at times - eg one guy I taught Java to (at a position where java wasn't required except for a tiny tool), is the team lead at blizzard now. If I was made a pariah, I would hear about it over the years.