So much of the longbow debate seems to be focused on heavy warbows fired accurately at individual targets. But accuracy doesn't have to be the point the way it was at Crecy. The Brown Bess musket was commonly fired in battle from 50 yards away by massed ranks of infantry, although it was capable of hitting man-sized targets at 175-200 yards.
So suppose the longbow is used as an area suppression weapon instead. You don't need highly trained bowmen who have spent years developing the muscles and technique required for the bowmen of yore. You just need a thousand or so strong country boys equipped with 60-80 pound bows and the minimum training required to understand at what angle to aim the arrow for a particular range. "Nock arrow. HAR!" "Position 2, HAR!" (The angle required for a 100-yard flight at full draw.) "Release!"
In use against massed ranks of enemy infantry, flights of arrows would be falling not just on the forward line but also the ranks behind them. Without shields or armor for protection, the experience would be unnerving, to say the least. The rear ranks couldn't even count on the bodies of the men in front of them for protection from injury or death, the way they could from gunfire.
There have been many comments, both here and on similar threads in the past, to the effect that a constant rate of fire would be impossible physically. Just for the heck of it, my brother and I went to a field on his farm last fall with his hunting bow and some practice arrows. At the time, I was 60 years old and in what I considered fair shape for my age, meaning I went to the gym three or four times a week and alternated cardio with light weights. We measured the bow at 70 pounds.
I am not a bowhunter. I haven't pulled a bow since I was a teenager. I made two or three practice shots to get the angle right, then I put 20 arrows at the far end of the field, about 110 yards, in a leisurely four minutes without undue stress. I had no doubt I could have kept going for at least a few minutes more. My brother, younger (early 50s) and stronger and more experienced, did the same in under three minutes and didn't break a sweat. We weren't trying for pinpoint accuracy, just speed and putting the arrows in the same general area. He was of course much better at that than I was. In fact, we lost two of the arrows I fired when I overshot into the trees at the edge of the field.
ETA:I absolutely felt the strain of the experience the next day in my back muscles and triceps. I would probably spend some more time in the gym before trying to repeat the experiment.