Why would you need to insert a "backdoor" in a cert in the form of a crappy key, when you could just use a real key and provide it to whatever shady organization requested the backdoor in the first place?
Versus: "The government ordered us to give them the keys and forced us to remain silent about it" - now all the damage lies on the government, who is likely known to already do stuff like that (or at least it isn't a surprise) and will hide behind the banner of safety or national security or something. (Whether it's true or not)