This is not wrong but it leaves out a huge amount of hard work which wasn’t in the cool kernel hacking space. LXC is a significant accomplishment but Docker solves a number of other non-trivial problems which made mainstream adoption harder – it’s like the people who say Apple just copied someone else who had a touchscreen device without comparing the whole product.

But, frequently, commercialization feeds the "development" half of R&D. Companies like Docker Inc. often end up paying the lion's share of the salaries of the people doing the FOSS work to upstream and maintain the technologies they build upon.