Baby powder is usually corn starch now.
Edit: I now see that'll be phased out, later this year https://www.jnj.com/johnson-johnson-consumer-health-to-trans...
Corn starch as a replacement sucks compared to talc.
When something “sounds” like it and you don’t have any evidence, it IS a conspiracy theory.
Studies can be replicated(or failed to do so) by a company the size of J&J.