easy there pilgrim, it is not a problem for how you use your boat. all my mains hit the back stay. gives me more sq ft aloft, which i like. will it fray over time, yepper. then take it in and have it fixed.
every wintwer i have my sails looked at. sometimes they need a little something. sometimes they will add a wear patch.
so to the sailors that do not understand that it is just fine, what about your over lapping jibs? they rub on the shrouds every tack, they rub on the mast every tack, then they rub on the other shrouds on the other side, then they flog till the are tightened up. over time you will have your jibs worked on, over time you will have your main worked on.
your main is fine, your main is cut correctly. over time keep an eye on your main just like your jib. have the loft tweek them as needed. like every 500 days of hard sailing.