There are a lot of things I don’t like about academia’s traditions.
Having references and sources is a must. Putting them on screen during a presentation is not.
The presentation is not the authoritative final version of the research for others to reference. It’s the quick entertaining version. It’s the advertisement for the paper. The paper needs the citations. The presentation just needs to entertain and entice. A presentation is a kind of performance. A one person play of sorts. Audience members don’t stop a play in the middle to check sources, or ask questions. Q&A comes after the presentation is finished. You can have a separate slide deck, of only charts and graphics with corresponding numbers that you hand out to the audience specifically for questions. But that’s not part of the presentation.