well, there's nothing "unhealthy" about saturated fat. it's actually good for you and you do need it. vegetarians get it through oils like olive oil. so, saturated fat isn't a problem. if it's moderated (i get this much from meat, this much from olive oil or whatever, etc), then it isn't problematic. also, not all meat has antibiotics, hormones, etc. you can get organic, biodynamic, antibiotic-free and hormone-free meats. it's all that my husband will eat.
the same is true of dairy. pasturized isn't great, but raw is healthy. raw dairy comes from organic/biodynamic farms and are also antibiotic and hormone free. So, it is possible to get meats and dairy that are healthier.
transfats have no real benefit. enriched white flour, also not great--you know? so, they're obvious. meat and dairy can be healthy in the right quanities and from the right sources. transfats will never be healthy. that's the difference.