I was at an event in NYC several months back where a mid-stage VC said the same thing (blanking on his name) but specifically regarding the NYC community. It was an angle I hadn't thought about and initially had the same negative reaction to as someone in the midst of an early stage company.

For later round investors it's undoubtedly in their interest to encourage these engineers to join larger firms rather than being on their own. In NYC it's especially competitive given the competition between more mature companies, early stage startups and the money wielding finance industry. The combination could lead to a 'glass ceiling' of sorts for larger companies because of the inability to attract talent; that is, until some of the smaller companies fail and these individual engineers likely end up at a larger spot.

It mirrors the consolidation of an industry. It just takes longer than some investors (like Parker) would prefer, which is the inspiration for statements like this.