"I don't see why it won't affect all that are self employed. Shouldn't be any difference if it's a farmer, roofer, painter, seamstress, etc"

I don't understand your comment.  It's going to affect everyone - not just the self-employed. 

Those that are employed and get health insurance may not write the check, but it is still going to affect them.  They may not be as concerned as the self-employed, but it is still going to affect them.