I think the original point was misunderstood/twisted over time.
TL;DR Inexperienced != Bad
"The key point here is our programmers are Googlers, they’re not researchers. They’re typically, fairly young, fresh out of school, probably learned Java, maybe learned C or C++, probably learned Python. They’re not capable of understanding a brilliant language but we want to use them to build good software. So, the language that we give them has to be easy for them to understand and easy to adopt."
What Pike meant is that a company (e.g. google) cannot hire only people who have deep understanding in subtleties of advanced programming language theory and had the time to go through a long learning curve to actually reap the benefits of these advanced programming languages.
These young engineers are not bad, quite the opposite they are usually bright and brilliant young engineers
The problem with that kind of people is that they will use their cleverness to build complicated and beautiful stuff, but when combined with a lack of true and deep experience due to them being still young, this can become counterproductive.