"Home Sharing enables you to transfer apps among up to five authorized computers in your household. To do so, you will need to turn on Home Sharing on each computer using the same Apple ID."
http://support.apple.com/kb/ht3819
Please do tell me what part of the above do you not understand? Are you saying Apple is saying you can transfer them but you can't use them? You can transfer them but you are not authorized to use them? You're hung up on the streaming part of Home Sharing and keep missing that Apple specifically states that you can LEGALLY TRANSFER APPS AMONG PEOPLE IN YOUR HOUSEHOLD USING HOME SHARING.
I am doing it right now. Regular device authorization DOES NOT allow this. You have to be signed in with the same Apple ID. Only HOME SHARING allows you to be signed into a different Apple ID from the app that was purchased and STILL LEGALLY BE AUTHORIZED to USE the app. Home Sharing's own distinct authorization
above and beyond the regular 5 device authorization does the validation.