When I was in high school, we had an (excellent!) teacher of Italian literature who always interpreted texts according to a specific key, which she tried to explain through the historical and philosophical background of the era. At some point she gave an interpretation of a novel and, rumour has it, because it was the time of the rise of social media, one of her students contacted the author on Facebook and asked if the interpretation was correct. And, rumour has it, he said no. We were all outraged at the teacher!

However, it's difficult to talk about any artwork without ever discussing an interpretation. By saying "I had nothing in particular in mind", we risk having the opposite effect, that of forbidding any kind of interpretation or discussion. It should be made clear that this means "you are free to interpret", not "there is no interpretation whatsoever".

Finally, a remark: the author is saying they had nothing in particular in mind, but this is not true. Not that they're lying - they are fooling themselves.