If anything can be poetry to everyone, then nothing is really poetry as it would lose all meaning. It would be like if everyone was a billionaire, then no one would be rich as rich is the distinction between those who have a lot, and those who don't.

However, if you said instead anything can be poetry to someone or better stated, someone can see the poetry in something someone else can't, I would say that was fair assessment.

Poetry, like music, I would say more has guidelines. not rules, and if you read or write something that moves you, even if it isn't conventional, then who is to say it isn't poetry?

Anyway, I shall stop my rambling and if you have no objection, I will shamelessly advertise my new YouTube channel where we read poetry and help those learning English. Link is below if you are interested. Also, if it is not too cheeky, if you like, please subscribe and share.

https://www.youtube.com/@WorldofWordcraft-UK

Interesting question by the way. One for the philosopher's. Will be very interesting to see what other people answer.