I agree but other than in major central business districts there's only so many places to house thousands of employees such as Google, Facebook, etc. For that reason, I don't think suburban corporate campuses will entirely disappear. Attracting tenants sub 30K square feet (guessing here) I can see this obviously being a big problem.
In the case of Google & Facebook, those employers have adapted and built office campuses to provide all the amenities the article suggested to stay competitive in a suburban setting.
I do agree with your statement but it is also complementing what the article is also suggesting should happen to office parks.
This isn't really a new thing though. The company I worked for in the late 80s/90s had a suburban campus and it had multiple cafeterias as well as other things that matter less today (cleaner, ATM, travel agent, insurance office, etc.). If a company in an isolated suburban office park doesn't provide services needed on a typical day, bad on them. But the basic idea isn't especially new.