It can indeed take some time to switch over, but why would you intentionally suppress a correct warning in the meantime? There is no good reason to mislead users here.
I do my job but there's only so much I can do if the owners of the servers who are serving my software tell me "before we can change this server's configuration we need approval from another office, it will be a few months until they can get back to us."
(This is a hypothetical situation, for me, because I eventually got all my customers on HTTPS back around 2012 or so. There was some push back and it did take a long time and we had to be very persistent with some customers... But it was well worth it!)
We are talking about the world of corporate IT and pointy haired bosses. I don't implement a social network, or email, I don't accept payments - I make intraweb sites that non-technical corporate paperpushers use to do their job. They are only interested in getting their work done; they are happy when they can get their work done without scary warnings they don't understand. If my software is giving them errors they are going to believe that it's my software that's the problem, and that doesn't look good for us. And we have to field support calls and explain ourselves.
...Or we could put a quick and dirty stopgate in to avoid something that makes us look bad and we can't do anything about.
