I don't know where you get your information, but in this case I'm pretty sure it's made up entirely. My "law firm" didnt exist until June of last year and hasn't filed taxes or issued an income statement yet. There is literally nobody who knows exactly what the net income was on the last six months of 2016 yet, including myself. It's just not baked yet. If your number was correct, and I really did earn 60k between June and December, it wouldn't be all that bad. I have zero overhead and no employees. But no, your number and your assumptions are incorrect.
And even if they were, making equivalent money working for an employer and working for yourself are very different things. My hard work doesn't earn profits for someone else, just for me.