Scope creep is one thing. Absurd dead lines cost alot too. Marketing cries for a release date so they can put it in their pr articles.

Indie games just slap early access on it and go by its done when its done. Plus continouous features etc years after initial release. The success formula Blizzard once had.

Turns out putting more stressed devs onto a project, more micromanaging bosses does not increase development speed.

Much of the money spent goes into marketing, not even development.

Now Indies don't even come close to that with their marketing spending. To be fair the overall majority of Indies disappears into obscurity and never makes it to the top.