Agree. Even with less than ideal equipment, with good form you can get good shots. Some have probably heard the story of Howard Hill going around the audience and taking whatever arrows people happened to have with them, and then shooting them all into a tight group.
I have been shooting my longbow recently with wood arrows. I can accept that I won't be as accurate with the longbow and wood arrows as with my recurve and carbon arrows, because the wood arrows are heavier, so have a higher arc, and aren't as close in weight as the carbon arrows. But I find that in addition to that, my mind is playing with me and I am making a lot of form errors: plucking, torqueing, dropping the bow arm, etc., that I don't usually make when I shoot my recurve.
I just got through sorting my wood arrows and separating 7 of them that are fairly straight and close in weight from 3 that I can't seem to straighten completely. I marked the 3 so I would know when I shot them, and then decided to shoot those three crooked arrows in the backyard for a while. I must have been more relaxed or focused when I shot them than I have been recently, because I was putting those 3 crooked arrows into as tight groups as I usually get with my carbon arrows out of my recurve. Hopefully, this will give me the confidence I need to shoot the 7 straight ones better than I have been so far!