Hope is not a plan.
I hope it doesn’t rain today, but I plan to take my umbrella just in case.
At the heart of project management is a hope or dream that, whatever the outcome, it will be positive and timely. The larger the project (dictated by number of people involved, amount of time needed to complete the project or general complexity of achieving the project goal), the more “project management” is needed.
Millions of projects are undertaken each year with little more than the final goal in mind. Many of those will reach the goal with little more than an Excel spreadsheet of tasks and a person with the drive to see the mission accomplished.