Winter golf brings an element that PCC, perfect or imperfect cannot allow for, and this is the increase in random variation, particularly due to plugging lost balls, and balls lost in leaves. You are even less in control than usual in this game, and luck can be a dramatic influence on your score. Links players probably dont have this. But many of us do. Winter wont necessarily raise or distort your HI. But it might. So not putting in cards in those circumstances is perfectly reasonable. I usually play a couple of qualify competitions in such questionable conditions at the beginning of the season and at the end. But Nov-mid March we are non qualifying so its only a few rounds and little influence. But if we were qualifying through those months, no way I would put 5 or 6 months of not-really-fair-golfing-conditions scores.