This is a well articulated article and the OA makes some good observations about the differences in evaluation between a product engineering org and an infra engineering org. It's also clear he's got real technical chops to finish a masters degree and then make L7 at Google in just under 8 years, and clearly that doesn't happen without an ability to navigate some level of large org politics.

I will say though, that there is still a good amount of naivete in the reasoning presented. The bottom line is that these generalizations and rationalizations are based on a single vary large company and implicitly dependent on the viewpoint and priorities of a bunch of VPs and executives whose mental model may or may not align with how you see the world in the infra trenches. Now Google is an engineering-driven culture, so the author is probably not too far off, but it also represents a particular time and place. Google has enjoyed one of the strongest and most profitable market positions that was cemented years before he entered the work force, and so there's a level of comfort and sheltered existence that infra teams at most companies do not enjoy. Make hay during the good times, but always be aware leaderships attitudes and priorities can change very quickly due to market or investor pressure, and at that point you need to be ready to adapt and articulate your value in a new environment of greater scrutiny, or to a new company (in the case of layoffs).