You are right I guess....but when I think I trained really hard, I do have more DOMS.
I know the research and stuff, but a heavy training results in more DOMS for me, period.
I hear you, but it sounds like pain is your end goal.
Other than that, I can train to failure on machines and feel nothing the next day, and do the same with free weights and feel sore for a week, but again, that's no guarantee for more strength or hypertrophy.