I think this is only true for small LEO spacecrafts that are more or less 'disposable'. For higher cost GEO and interplanetary spacecraft, consumer electronics are not going to be hardened sufficiently and flight-proven to be used in those applications.
Isn't really about those being higher cost - as the Planet people say, their approach is only possible because they're working inside Earth's magnetosphere.
They also mentioned that they can afford to have satellites fail since they are cheaper and sending up so many. Also won't be possible with one-off GEO birds.
