IF everything else remains equal, yes, longer bows will allow for more mistakes by you the archer with fewer bad results.
Thing is, any bowyer will tell you that there's no such thing as "everything remaining equal". Bowyers change setback, riser length, limb design and brace height to very effectively work around the limits of a shorter bow. There are some dandies out there these days at or under 62 inches for longbows.
There are always tradeoffs. The closer you walk to the cliff edge of bow design, the more tradeoffs you are required to accept. Whether that edge is bow length, mass weight or limb design, the more radical you get the tougher it is to deliver the less noticeable pieces of bow performance, like stability, repeatability and forgiveness.
To sum up a wordy answer, I've gotten rid of short bows because they were too short. I've never sold a long bow because it was too long.