On a purely democratic basis, most humans believe meat it good for them, and will eat it when given the choice. The vegetarian movements are small, and outside religious communities, miniscule.
In absolute numbers we are talking about 500 million people[1]. A minority, yes, but hardy miniscule. And with higher percentages in the richer countries, so lack of access to meat doesn't seem to be the reason.
[1] https://en.wikipedia.org/wiki/Vegetarianism_by_country#Demog...
There are millions of people who chose not to eat animals for different reasons (ethical, health, environmental). And this number is growing faster than ever before, as people become more educated about the issues with animal agriculture.
I don't know why you would classify it as "bad for you". It looks like you are projecting your opinions.