I agree with the second statement, but I actually disagree with PG on the first one. Trying hard doesn't necessarily mean quitting your day job.

It can mean doing a day job to support your family whilst working on your project in your spare time.

Using the reverse logic, most people that produce something that people want will be earning enough from their project to quit their day job. PG's observation doesn't imply for me that quitting the day job has to come first.