There are a limited number of ways to have any substantial effect on a bottom-up system like the economy in a free society. You can pass laws forbidding some activity, or offering benefits to try to encourage some activity. You can raise taxes to make an activity prohibitively expensive compared to the desired alternative. You can educate (or propagandize) the population to recognize or believe something. You can conscript people and force them to behave in a certain way (tough in a free society). There aren't too many other options.
When we're discussing how to increase growth, it's not really helpful to say that we should ignore one of the primary levers we have to play with, because that lever isn't nearly as powerful as "changing the paradigm". Okay, great, but what specific actions should we take (i.e. what lever should we play with) to change the paradigm, other than the lever we're talking about?