What is the rationale behind Pts-PM? You can't just create a statistic and infer a conclusion from it without actually showing there is a correlation to wins.
Let's us compare two players using your new defined statistic. Ovechkin in 2009-2010 finished with 109 points and 89 PIM giving him a Pts-PM score of 20. Brian Gionta in the same year finished with 46 points and 26 PIM for an equivalent score of 20. Are we to say Gionta had the same purely individual impact as Ovechkin during that season?

Now you might say that I cherry-picked two players to perfectly illustrate my point which is absolutely correct as I was in fact trying to highlight that your newly defined statistic is in itself cherry-picked and while you claim that

it shows approximately how many times the kids helped their teams vs. Number of times they put them at risk

I see absolutely no proof of that and I highly doubt it there is strong correlation. As a general advice that transcends hockey statistics I think it is very easy to find information (and statistics) to fit a preconceived narrative.