Sure... WordPresss is better in terms of flexibility if it is self hosted. But if your friend is still keen on moving to blogger without wanting to loose his wordpress blog posts, comments and tags, then here is the way out:
Login to WordPress and navigate to the Dashboard of the blog that you'd like to transfer to Blogger. Click on the Tools tab > Export link, then download the WordPress XML export file by clicking on Download Export File and save this file to your local machine.
2. Go to WordPress2Blogger, browse to that saved document and click Convert and save that file to your local machine. In this file will be the contents of your posts/comments from WordPress in a Blogger export file.
3. Then from your Blogger dashboard: Settings > Basic tab and click "Import" to import the converted file.
I hope this helps :)