Oh, by no means is it wrong and I don't want to discourage anyone. It's just that if you're starting out from scratch, I assume you don't have development stuff available, which means you probably want to use a lab. Which means whole rolls or whole 4x5 sheets are going to be much simpler.
If I had never developed film before and started with some cut-up 35mm, it probably would have severely discouraged me. I would hate to see that happen if a slightly different solution would remove some roadblocks to easy processing of the images.