Trading without any trading plan will ve the same thing we jump in to gambling, because trading plan possible to minimize the risk and to maximum the profit. No one trader possible to make profit by consistenly without any trading plan.
Well, yeah. But I'd like to mention that having a plan is not quite about gambling. For example, in cards games you can be saved by following some strategy and "golden gambling rules". But if you deal with slots, it's another story that is full of RNG.