Meaning or no meaning?

I started wondering do poems have to be evasive and have a secret code. Is it bad if the message is clear, does that make it a “weak poem”.? Many of the poems we read we tend to look for what are they talking about or what was the poet going through that could have influenced that. However what if is just a combination of words that worked well together or images that came to mind and they just made sense of them. Does there have to be something for the reader to figure out or can it be straightforward?. I just notice that most of the more spoken about poems have hidden messages so I fell as though they make it better in the world but is that always the case. I guess I am curious as to what makes a poem stick or what makes it a strong poem. I always thought it was language and how you make certain words blend together. Or if there was a story aspect to it and takes your reader from their reality and into this mini world or moment you created.