Whatsapp was making money, but was that enough for the VCs? Even if it was not burning currently, it might have burned it in the past, so if the VCs trigger the clauses to ask their money back, you might not be able to give the money to them, ending up bankrupt. Plus, VCs might have a majority on the board. They see nothing but money, so they will push for the option that results in the highest payout for them, even if it is immoral, and even if that means using their powers to kick out the founders.
VCs look for businesses that 10x their investment in a very short time frame, and use that money to finance their many more failed ones. What might be a solid business in the wild is something they cull.