The rule of thumb on this, I think, is to ask yourself if the specific words you’re talking about here will be the main thing people talk about once the poem is published. Will those words be “what the poem is about” to them, will they stop readers in their tracks and cause them to disregard your larger meaning. That’s shallow on their part, but if it is likely to be the case, consider alternatives. We’re writers here, so there are always alternatives. I don’t think “staying true to oneself” means having to stick with language you’re questioning, just because you’ve already written it down. My two cents.