Yeah it helps, but it is not required.
What the hell kind of cheap ink are you using? No ink I have ever used wore down after washing it. I have been printmaking 5 years now. I have taught a number of people how to do it as well. I have made money selling, t-shirts, and prints that I have made. I think I know what I am talking about, guys.
You are all making printmaking seem like its some big expensive process. It's not. You can get by on absolute basics and still make awesome t-shirts. You can use old window screens, if tight enough. You can use really thin, tight, fabric. Making screens themselves is half the fun! You can even use the sun for photo emulsion! It is cheap and fun and beautiful, if you know what you are doing. Honestly, the most expensive thing you will have to by is ink, or t-shirts, but even then you can still get good ones at decent prices.
I happen to love the art of printmaking. It is a craft. It is my craft, my art. If I had the balls, I would quit my shitty minimum wage paying job I have now, and go back into the art of printmaking. It something that makes me incredibly happy. People have even commented on how different I am when I am printmaking, because I am so happy. I know what the hell I am talking about with printmaking, guys. I'm not a dumbass. Maybe I'm a little bit of an elitist when it comes to this, but I am speaking from experience. I love printmaking.