Anyone running their own business will realise that this job involves millions of details and moving parts. If you are the only person you rely on to remember and act on all of these things, you will get burnt out. Things will get missed and fall through the cracks, and ultimately this will result in the loss of customers.
This is why the creation of systems is crucial if you are to create a joined up and productive business. People are often averse to setting up systems, but really, a system is purely a series of steps for a particular task. Once you gate a good ‘system’ in progress, you can then hand this list of key tasks (the system) over to a key member of your team to complete, so you don’t need to.