Why do text editors use a monospaced font?

Question

IDE

Why do text editors use a monospaced font?

Answer 1

['a', 'b', 'c', 'd',
 'e', 'f', 'g', 'h',
 'i', 'j', 'k', 'l',
 'm', 'n', 'o', 'p',
 'q', 'r', 's', 't',
 'u', 'v', 'w', 'x',
 'y', 'z']

['a', 'b', 'c', 'd',
'e', ​​'f', 'g', 'h',
'i', 'j', 'k', 'l',
' m', 'n', 'o', 'p',
'q', 'r', 's', 't',
'u', 'v', 'w', 'x',
'y' , 'z']

Answer 2

I would understand in the terminals for the correct display of the cursor. But in editors, this is something new.

Answer 3

Because it's convenient.