I don't think you have anything to apologize for. We all pretty much buy our fabric at Joann's. There are only so many different styles out there, and especially the fleece is rather limited. This is a free country and anyone is entitled to go into business. Even if you are offering a similar product as other people, no two products from each company are alike. Every handcrafted item bears the "marks" of its crafter, and those subtleties are what stands out in a product. Those who like the "marks" of one crafter may not like the "marks" of the other. It's all good, and anyone who does great work will find that they will continue to attract a regular clientele and has nothing to worry about from other crafters in the "pool."
fwiw, my

, jmho, and all that...