If you review the thread, you'll notice that I was trying to address the OP's initial concern, but I was trying to make sure I completely understood the issue. The response that you're upset with was a bit of a sidetrack. You may also notice in my recent post that Rukbat's response was to a post that has since been deleted, not to the OP. I think I may have to clean up this thread so that there are no further misunderstandings.
Your solution is fine if the OP is constantly in a poor signal area, but it would also require them to remember turning off Airplane Mode whenever they move into an area with better signal. If signal is spotty throughout the whole area, this might be unfeasible, because it can be difficult to know exactly when you've entered an area with signal unless Airplane Mode is off.