I understand the move but I also see bears on the road.
When the politicians control their communication apps then it is sooner or later also very convenient for politicians to ask the operators to disappear conversations that shouldn't have taken place or conversations that somehow are political liabilities.
I agree, it is shortsighted (next quarter syndrome). First of all the AI does not need source to find vulnerabilities and further it breaks the unwritten contract to exchange source for eyeballs which creates better source. I guess the CEO wants less security and stopped evolution of it's code.
Simple answer: Because the stupid hipsters try to change a simple concept of a state machine into MVC hell.
More complicated answer: The weak side of the open source world is that it attracts a lot of developers with big egos who think that their fancy solution to a situation without problems is the best one. And they all compete with their too big egos and complicate our open source world.
Real answer: too much memory, this causes people to come up with too complex systems as there is hardly a limit to their dreams, real inspiration comes from dealing with limits. That is why programs from yesteryear are often so good when looking at what they do within their constraints.