It's not mutually exclusive. But it depends on Product B, and oftentimes these kinds of tech companies want to grow in completely different areas.

Take Amazon, for example: they have great engineers, but probably not too many game developers (or those interested in moving from current SWE positions to the game division). And they almost certainly had no artists on board, among other disciplines needed for a game. So when making Amazon Games they would have to mostly hire new staff. Not the best example given how they floundered for a decade, but I think that was a management issue over a talent issue.