Your website needs to be available and working properly at all times. If your site goes down, or is otherwise broken for some technical reason - would you know what to do? How many potential clients might you lose? What would be the cost to you?
Software needs updating. Hackers need to be kept out and Google needs to be reminded that your site is the best answer to your clients' questions.
You could look after your site yourself but is that really the best use of your time? You're probably better off focussing on your business.
You could use the services provided by the large generic hosting companies. However, they don't have your particular individual needs in mind. They are not going to truly care for your site; they'll just give it a home and act like a commercial landlord.
Our care plans are for our clients. The sites we built. We know the needs of your site and are in a good position to offer the care and attention it needs. If you are not a Very Simple Sites client feel free to get in touch and we'll see if we can help.