What’s up with these people on TikTok that think that everything is fake

Every time I see a video about Artemis II or other space related things the majority of people in the comments are always saying that it’s fake I genuinely think that TikTok is shrinking our brains because space is definitely real and my grandpa even used to know a dude who lived in the ISS for over 200 days and there is no way that all that is made up by the American government or something