Well, is there anything wrong with that? I'd rather they spend that time painting than drifting.
But seriously, it shouldn't matter how anyone spends their time in any game. I'm actually one of those people who spent most of my Forza time painting and making race cars. Some people prefer drifting or tougeing. Suppose GT6 has not only a full blown livery editor, but a ModNation Racers style track creator, and some of us spend tons of time making race courses. Heck, I'd be all for collecting some well made race tracks.
The thing that's awesome about gaming is that we can all enjoy them in our own way. And if part of that enjoyment is something we can share with the community, even better. 👍