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.
I wasn't specifically calling you out, but more broadly companies know that the average tenure keeps getting lower, for reasons on both the employee and employer side. But even places I have seen career development done, it was generally reserved as a "perk" for employees who at least had a few years in.
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.