If you need help with a shortcut, then post the iCloud link so we can take a look.
As for why do you need shortcuts? You don't, but I have automated my life with them and can't stop.
For example, I have one that I run first thing in the morning that turns off DND, sets my volume low, runs a script to set specific reminders to keep me on schedule in the morning, then opens my meditation app to my current meditation.
then later in the morning I run one that gets the weather, my schedule, top news headlines, birthdays and sends a birthday wish, the NFL scores/ upcoming games and then asks if I want to see the following days schedule.
then when I am ready to drive to work, I have one that determines the time it will take to get to the office, asks if I want podcasts, music or an audio book, then opens nav ready for me to go.
after work I have one that sends my wife my ETA home, sends her a random love message, asks what audio I want for the ride and sets up Nav.
Then right before bed, I have one that sets DND, gets me the forecast for the next day, runs my goodnight HomeKit scene to close up the house, then opens my sleep meditation.
So in the end it saves me lots and lots of steps.
I also have over 100 other shortcuts that I use but, I have issues and can't stop writing new ones.