I think OP got confused and gave an example of how allegedly browsers on Linux are more secure because there is no DRM (because DRM to an extent allows another party to control what your computer can and can not do, through an unvetted binary blob). But even then they are wrong, as DRM works on browsers running on Linux.
He's right in that Disney+ doesn't work on Linux however, as it uses Widevine L1, which isn't supported, and which I doubt will ever get supported. I personally expect Disney+ to allow L3 eventually, which is supported on Linux, as it's just software based.
