Now now everyone, you can disagree but play nice.
The thing to remember about Ashby is that he ranked perfect arrow flight as No.2 and total arrow weight as No. 6! Not even top 5! All he said was it makes a difference, not that it was a total necessity.
Having a perfectly tuned arrow (as the fellow in the video stressed very much that he had) is always more important than other factors, but once that is achieved, adding weight will also add penetration. If you just hit a whitetail through the ribs from 10 yards it may be a moot point, but if you hit the "T" on the scapula (not just the soft rubbery lip) that's when things like total arrow weight and BH choice can make a difference.
Another person's arrow choice doesn't have to ruin your day, just take it all in as additional data points. Even as a heavy, SB arrow shooter I really liked this video and found it encouraging to make me want to experiment with different setups. However, as I don't shoot a highly adjustable bow and am not exactly an Olympic-level perfect finger shooter, my tuning will probably never really get to this guy's level, and as much as I hate to admit it, neither will my accuracy. So for me, stacking the deck in my favor with a heavier arrow and efficient BH can't hurt me, but neither should I or anyone else fall completely into one camp or the other.
Watch, learn, and pay attention to the context of all the data that's coming in. Lots of things can work in different situations - just go read Ishi or look at how crappy (by today's standards) the archery tackle and stone points were of the Native Americans who put meat on the table every day! It probably takes less than you think, but tinkering for perfection in your situation is fun, so let it be fun!
