High school diploma is not exactly high skilled. But I agree with the rest of what you say, that there are a good number of immigrants on DV who are high skilled, including you.
But the problem of basic skilled immigrants getting DV lottery over highly skilled immigrants from certain countries getting shafted still remains as is. Most taxi drivers I have spoken to in north east either come through DV or family based legal immigration path.
With a merit based immigration system, you and I can immigrate to US with way fewer hassles and uncertainties while less skilled people will need to skill up to be eligible.