Did anyone actually think WeChat communications are secure? Do we have reason to believe iMessage and Whatsapp are more secure?
This narrative of false equivalency is dangerous, IMO. WeChat has been proven to be a heavily monitored and censored network. Whatever security failings iMessage and WhatsApp have, they pale in comparison to what's in place for WeChat.
You say the security failings of iMessage and WhatsApp pale in comparison to WeChat; I agree with parent comment and ask - in light of PRISM etc. - on what grounds can you say we should not be just as suspicious?