Because if you don't have one, you miss gems like this email from Beto O'Roarke to his supporters:
https://twitter.com/cd_hooks/status/1061759112432836610
blah blah blah
And the responses:
And then there are my kindred spirits:
https://twitter.com/cd_hooks/status/1061759112432836610
blah blah blah
And the responses:
And then there are my kindred spirits: