Have a policy: If you're website isn't responsive then you are subject to being parsed via Chrome mobile browser. Something to that effect. But back to my point about fixing or redesigning a website that depends on Google organic search and Google Adsense earnings in 2017 is what?
From, this, and other comments like "I didn't get the memo" it sounds like you are more unhappy that no one personally wrote to you and said what might happen?
If so, consider this entire thread a notice to that effect.
YOU CAN, of course, notify g you'd like to opt out of weblight. That's available, but most likely will not give the result desired.
Having been a Luddite, and still am in some web matters, I fully sympathize with the angst and rage against the machine. I also don't tilt at windmills. I draw the line at too much reliance on js, in part because most of the time I don't need it, the rest of the time because there's all those ad and script blockers out there. :) Meanwhile, responsive is just another method of layout and, if you really really really think about it, is just another step in the use of CSS which, 12 years ago, was poo-poohed as non-essential and no business website needed it to make money. Well, that ship sailed a LONG time back. :)
Same will hold true for desktop specific layouts. At present the ship is still in port, taking passengers in rapid fashion. You can board for the voyage, or wave from the shore as rank and profits sail for the horizon.
As always, the webmaster is in complete control of their site. G is merely in charge of their index and listens to how the users want to use it. And a LOT of those users are very happy to see notices that warn they can't reliably view a page or it might drain their bandwidth after two pages. Your choice.