whats someones thought process when lying?

Im genuinely asking because I cant wrap my head around it. When i noticed my densisty in the corners was thinner I was asking people and was told it was in my head. Or im imagining it. I posted on here and was told it was in my head or got replies with "what hairloss". im like a norwood 1.5 to 2 but I have diffuse thinning in temples before i started finasteride. im on it 3 years and recession is frozen. But then i had people saying that they could see it was thinner but didnt want to tell me because its bad for my mental health. This makes no sense to me because its even worse for someones mental state if they think they are imagining it or going crazy seeing things. Same on here people just lying saying "what hairloss" when someones cleary thinning . Its real backwards thinking and does more damage . Is it that people genuinely cant see it or are just virtue signaling ?