I square my blocks, square as I construct. Nothing is Perfect! We’ve been shown the Beauty of Imperfection by looking at nature where every flower or leaf is different.
judges do look at workmanship and want things done as well as you are capable of. The quilts I’ve had appraised and judged have never been ( Perfect- there is no such thing) but they have hung straight, the sides, top & bottom have been straight and measure evenly, judges look at mitered corners, make sure mitered binding is stitched closed, quilting can make small imperfections disappear, quilting should enhance the quilt and be balanced. The overall appearance when you step back and look makes the biggest impression.