I definitely knew how to set up a build server, CI pipeline, etc. It just would have meant that every time I (not we!) changed the build, I would have to fix my own machine and the pipeline. I'd much rather spend that time fixing one more issue, or adding one more feature.
There are numerous things that increase velocity for a large team, but decrease it when the product is just getting started. Joel Spolsky wrote about something similar almost a decade ago, https://www.joelonsoftware.com/2009/09/23/the-duct-tape-prog...