Someone goes to a Woodworking website and starts browsing their forums. They see that there's a thread to request free pieces to be made by talented woodworkers. Wow, cool! So they request a coffee table with a light finish for their living room. Lo and behold, a woodworker claims the request and makes a beautiful piece. Later, this person changes their decor and suddenly they need a dark finish. So they make a request of the woodworker to stain it for them to a darker color, to which he obliges. Then, not 12 days later, this person suddenly shows up on the forums requesting a new coffee table to be made because they've changed their decor yet again, this time to a super-modern theme. The old one is beautiful, and they just love it, but it clearly will not fit in. I mean, they loved using that table for those 12 days! It wasn't like it went unused. It was seen and enjoyed by all for those 12 days. But now they just need another table, because the decor needs it.
Now, does that sound ok to you? It shouldn't. And it's basically the exact same thing as what you're doing now. Graphics designers get payed a lot of money for a reason. The fact that what we create here isn't physically tangible doesn't mean that it should hold any less value in your mind than something that is.
And i4ni, while I understand and respect your position in supporting him, I'm disappointed that you're willing to go along with behavior like this.