In order to prevent a rival organised group from forming a platform, from which to launch a successful bid on something you want to sell later for much higher price, you use your influence to make sure its priorities are such that it is kept under the radar a little longer.
The trouble with this point of view is that it assumes the global radar is worse than that of a few investors from Canada who happen to know where Manitoba is. I sincerely doubt that.
One could also argue that by holding the share price down artificially, or otherwise, one makes it easier for some other entity to accumulate shares, as much less capitol is needed.
I certainly do not discount that Goodman at 30%+ as a holder would cause a lot of potential suitors to give pause, however.