Studies suggest that high levels of saturated fat - predominantly found in meat - lead to high blood pressure due to clogging arteries, and an increase in cholesterol and potential obesity. These things make us much more prone to heart disease. Also, high levels of a gut-generated chemical called trimethylamine N-oxide (TMAO) in red meat is shown to be linked to heart disease.
While these risks increase if you eat meat, the health repercussions of not eating meat are far worse, it is difficult for humans to maintain a healthy lifestyle without the steady income of protein and other things gained mostly by meat. Although Beans and Lentils and other pulses also contain protein the amount we need to ingest to maintain a healthy level of protein is much higher and nearly unachievable.
[P1] Meat causes health problems.
[P2] We should stop eating meat.
Rejecting the premises
[Rejecting P1] The health benefits of eating meat outweigh the cons.