I appreciate that it worked for you. I don't want to invalidate your experience. I just want to say that there is a good reason such a large gap exists between the evidence that job hopping is beneficial, and people actually doing it.
I want to point out that a) you have a skillset and job area that is conducive to freelancing and b) that building a network requires networking, which again is something that costs energy and social and communication skills.
These are not a given and should not be treated as a no-cost activity. Especially your last sentence implies a required focus on impact- again, your reward is more money, but there is a cost to doing this at work.