“Remember, many email clients or devices are not configured to display images by default. If your email is composed almost entirely of images that are not displayed by a recipient’s email client, this renders the content of your email unreadable and certainly not something your client can interact with easily.”
We live in an image-based society, but your emails can’t have too many images or you’re going to get flagged as spam. While it’s appealing to focus on content that’s fast, visually appealing and light on text, spam filters have been configured to notice imbalance between text and images. Make it your goal to find a balance and increase deliverability.