I assume you put in the statement to show that he _thinks_ going full time would make him more productive. But the flipside of that argument is what we _know_ which is he currently has another job.

So here you're showing that there's risk involved with your team. This risk would have to be balanced with an equally high or higher reward if you wanted to highlight it. Don't show an investor the door (in your deck) unless you want them to open it.