Paper trading is a plus because it gives you a "plan" and this is quite better than no plan.
Lot of people are trying to go from "ideas" to "ideas" but with no plan. And without plan, you lack discipline.
So paper trading can help, but IMO you must written behavioural rules too that you should respect with your plan in order to avoid big disappointments when you trade in real life. Easier said than done.
IMHO:
Trading real money with great discipline day after day is very difficult. Paper trading with great discipline is even harder.