7mb doesn't seem too bad in this age of fast net and big hard drives as compared to the inconvenience of what other method you get Python running on an end-user system.
I used to agree, but then I went to central eastern Africa (Burundi). 7mb takes a long time to download on a 3kbps connection. I'm not so sure now. There's a long tail of people with slow connections & small hard drives. I guess this issue is whether or not you care about supporting them.
A huge percentage of the Python code out there is server-side stuff. So, if you only have a 3kbit connection at your disposal, you're probably not going to have much luck deploying your application either.
