This is why BJJ schools often "forget" about takedowns.
On the other side BJJ discourages throws/takedowns. This is mostly done by declaring the guard a neutral position and not awarding any points for pulled guards. Oftentimes it is very hard to properly judge whether the takedown or the guardpull was initiated first. On top of that it offers an easy way out for anyone who hasn't a strong grasp standing up, as he can simply pull guard or even just sit on his butt and forgo the standup grappling completely. This is why BJJ schools often "forget" about takedowns.