Cameron made the movie, he wrote the screenplay, he directed it. He has stated Burke was working alone.
This is how he's written the story. WY didn't build a colony right next to the Derelict on purpose and then ignore the Derelict for 20 years. Cameron explains this by showing the Company don't believe Ripley.
Yet there is still this one person who's refusing to have any of it! It's just bloody mindedness now.
Burke was working alone, the Company don't believe Ripley. Weyland Yutani from the first 3 movies (as they cease to exist by the fourth) are NOT made out in any way to be cartoon super villans obsessed with the Xenomorph. Only in the 3rd movie do they show interest as by then the realise the Xenomorph is real and obtainable on Fury.