Trucker Brown's "10Hrs and Go" Rule Realistic?

I came across this youtube channel a few months ago and there's a video from 5 yrs ago where he discusses the habit that nearly doubled his income.

Only spend 10hrs tops off duty/sleeper, and get up and go. Supplemented by sleeping at shippers when able, docking, and getting loaded off-duty so you have a full day's clock when you're finished being loaded.

He does the math on the extra sleeper hours that could potentially be drive hours and it came out to ~$27k/yr in potential miles. Something around an extra 1500 miles/week as opposed to taking 12-14 hr breaks when there's time to kill.

Thing is I've asked my trainer about this and he says its BS. Places rarely are willing to take you early, you can end up rolling too early near your appointment time and be late because of HOS, and there are places that will fine the carrier for being too early.

Is what TB said realistic? Does it only work for flatbed and perhaps that's why my trainer doesn't agree because we're reefer? Would love to hear some thoughts.