Future is always uncertain. You never know when your website may get hacked, your server crashes or you accidentally delete an important file.
At that moment if you don’t have backup of your site then I am sorry to say, nothing will be left except regret.

Well, there are few web hosts that maintains daily backups but still to avoid any risk it’s advisable to backup your website using WordPress backup plugins.

Read more here https://www.noviceinfo.com/wordpress-backup-plugins/