There are tons of counter-examples to his argument — that successful organizations (and organisms) don't require exponentially unchecked growth. Do those mean either his argument is wrong, or those examples are outliers?
Mailchimp grew rapidly, then floundered while trying to find new growth areas, including a brief venture into "feel good" short films (coinciding with a fee increase to support this brainless idea).
Then... eventually sold to Intuit, which appears hell-bent on ruining the remaining reputation of Mailchimp.
They're rolling out a new UI, which is obviously not being tested internally. Buttons don't work or provide confusing terminology, preview runs off the screen, occasionally the CSS for their home page just breaks, etc. Employees are clueless and development appears outsourced.
(Examples: Mailchimp, anything Pieter levels makes, etc.)