Freelancer here. This does not ring true for me. I can see a causation between freelancing and vacation. Vacations "seem" more expensive as they are both a cost and a period of lost income.

But all those existential worries looks like an underlying issue with the person itself, more than freelancing in general. Freelancing may enhance it. But if you are more angry, less social and hence less happy, then no matter what job you are in - you should probably consider a change.