Office managers/office teams have very few concrete metrics. Beyond a binary "is the office functional" (e.g. are there enough desks, does the electricity work) there is pretty much no way to measure job performance. That's not to say their work doesn't have any impact. Anyone who has worked in a poorly laid out office has dealt with the corresponding productivity drain. However, it's really hard to measure that boost/loss and nearly impossible to accurately attribute it.
The solution is for office managers to do ridiculous but easily quantifiable things like spend money on subscription water coolers, an on-demand smoothie blending machine [0], potted plants that cost $800 [1].
If you are an office worker frustrated by this trend, you should invent some performance metric for office managers and then sell something that improves it. You'll instantly suck up all the VC money going to these other startups.
[0]http://getreplenish.com/#1 [1] https://www.leonandgeorge.com/plants/large-desert-cactus/