We've used one pretty much every night since our little one was a couple of months old 😬 I think this is unlikely to be true because it's no louder than just general daytime noise i.e. talking, playing music, other children playing and screaming at nursery/soft play etc
https://huckleberrycare.com/blog/white-noise-for-babies-sleep#is_white_noise_safe_for_babies
I think that's just if the white noise is really loud and also close to their head/ears all night, I also had a similar panic after reading something like this after having my 1st 🙈
we use youtube for him to sleep since he was born..our bedroom tv never shuts off 😅
My eldest has had white noise now for 3 years, mainly due to using it for her as a baby and then having my dec 2023 baby and she is absolutely fine, as long as it's at a suitable volume I'm sure there is nothing to worry about, white noise is a saviour for most parents x