Do we need testId when testing with RTL?

Here are 3 main use cases where I thought we needed it and we don't:

• IconButtons: by making buttons accessible (by using aria-label, for example) we can find them with ByLabelText queries. See src/IconButton.test.js.
• Matching against the visible DOM elements only. Sometimes we need to render hidden DOM elements. We have one real use case in the design viewer, it renders multiple pages, but only one is visible to the end user, the others are hidden using { opacity: 0 }. jest-dom provides toBeVisible matcher which can be use to check if a piece of text is visible or not. See src/PageContainer.test.js.
• Clicking on a particular button in a list. This is a bit tricky. Here's the use case: we have a list of items, and on each item there's a delete button. We want to click on the delete button of the second item. Out of the box, RTL doesn't provide any helper method to find the delete button associated with a specific item name. This is solvable by iterating through all the list items (li elements) and then search for a given text within the li element. See src/ListContainer.test.js.