There is never a need to ask a question like this one regardless of all the research one can make about it: Which is More Important in Design: Images or Text?
The answer is: they both are important. The answer also is: none are important.
This question is also flawed as well. Is not about importance in Design since it’s THE MESSAGE that dictates which elements the designer should use in his/her design.
Design is design, there are no design elements more “important” than others.