They're not random, you're supposed to vote for them.
And they're supposed to represent your general opinion. They're supposed to have an education in politic/economics/&c. which makes them better equipped to make informed decisions. And it's supposed to be their full time job.
Just like anyone can bake bread at home with no tools / minimum knowledge but the bakery at the corner of the street will make better bread.
They're not random, you're supposed to vote for them.
And they're supposed to represent your general opinion. They're supposed to have an education in politic/economics/&c. which makes them better equipped to make informed decisions. And it's supposed to be their full time job.
Just like anyone can bake bread at home with no tools / minimum knowledge but the bakery at the corner of the street will make better bread.