correct. Depending on trading to make your living is called "scared money." It is hard enough when you have a lot of money in the bank and a good job.
Leaving to "go fulltime" may cause a somewhat profitable part time trader to join the 95%.
For a lot of people, a decent job/benefits + part time trading will be a reasonable way to do this, since almost everyone who jumps in loses their money or barely breaks even, especially for the long haul.