You're hitting with ten times as many arrows as Pit as opposed to Dark Pit? Frankly, I don't believe that's how matchups work. This isn't Brawl where Pit's arrows were borderline OP.
Also the arrow shot is reactable even if you try to delay by charging. It's seriously not hard to avoid on reaction, and ultimately makes it mostly irrelevant in matchup discussion.
Also if you're jumping that high as Pit just to shoot arrows, you're putting yourself in a bad position when you could have gotten more stage control with stuff like his better F-tilt, frankly, and now instead of throwing projectiles, a smart opponent would instead go to juggle you. Pit's arrows aren't really "better", especially when in almost all the practical situations where they aren't unsafe to throw out, they're not even likely to hit anyone because their release is reactable.
Meaning in legitimate long range trap situations and in projectile wars, Dark Pit's superior reward on arrows actually matters a lot more in comparison.
First of all, you're forgetting that arrows travel faster with more charge. At half they're at Brawl arrow speed. At max they're nearly unreactable across FD. And since Pit can hold the charge indefinitely... Yeah. You're
going to get hit.
Dark Pit's arrows are even less safe close up because now he has like seven more frames of endlag (because he's on the ground) and only two more frames of safety at most on shield. Doesn't add up. Dark Pit's are much safer with more charge, but what's stopping the opponent from jumping over and Fairing you?
I said it's all offstage. Dark Pit isn't hitting Sheik at all. Pit will get 3 or 6% though, maybe more depending on how hard it is to hit her out of the Uspecial startup. (IIRC it has invincibility before it disappears?) Dark Pit also isn't doing jack to Villager, Bowser Jr, Wario, Ness, Lucas, Fox or Falco offstage with arrows. That's a few too many matchups where Pit's arrows have a major advantage to be ignored. Actually, how often will you hit with Dark Pit's arrows offstage at all? People have to literally line themselves up for you to hit them.
Trading even with Dark Pit's arrows is bad because they still don't do much damage. Typically you'll be out damaged.
In legitimate long range trap situations Pit can effectively vary the speed even after he fires thanks to the superior control. And you're still ignoring the whole "jump over projectiles" thing. It's not five jumps like you're thinking, it's just one full jump off the ground. Quick, easy and painless. Since Pit has three more jumps after that and one of the best Dairs in the game it's nowhere near as bad as you say even if for some reason you're letting them in like that.
Like, the freakin' CPUs demonstrate how much better Pit's arrows are. Why is this even an argument?