Ah, I just looked it up and turns out people have been having issues with steam since the new interface update; Is this what you were talking about? Or is it something else? If it is what you are talking about, you can always go to view - small mode to bring it back to how it used to be, therefore people with epilepsy and similar health concerns can use it without such contrasting colors.
I honestly thought you were talking about some weird conspiracy, and i think others may have too. I hope this clears up the original comment more.
If the interface change isn't what you were talking about, please tell me what in specific you think is going on with steam; I'm curious, as I don't see anything else relating to possible steam health concerns.
Thanks