Taking a step-by-step approach works because, truthfully, it’s oftentimes the only option you have along with avoidance. The solve-it-once-and-for-all way usually does not exist, we just imagine it does.
This is especially true about bigger issues. Because they don’t emerge overnight, they can’t be fully resolved at once. There might be a key part in the solution, an act that prevents things from going south, but to witness a solid improvement, taking some more steps is likely needed.
And then there are inevitable falls, call them the rule or exceptions, you cannot avoid taking the L anyway, therefore, you need to keep putting out fire, every day.