Are you someone who tends to leave things to the last minute? Yeah, I know the feeling, it's not great right? So why do this with your Mac (or tech in general)? We need our tech and IT to work 100% of the time.
You may not believe it, but I would say 95% of the time, the work I do for my clients is always an urgent one, why? Because our Macs/tech/IT is what we need to do our work. If it's not in good order, we can't work. Think of a car engine without oil.