I have a button<button id="stbutton"></button> and I can enter into the Chrome Dev Console $('#stbutton').click(); and it works. Sounds easy enough, however:
$(document).ready(function () {
    $("#stbutton").click();
});
Doesn't work. Also tried waiting for the parent div to load, no dice,
 $('#panel').ready(function () {
    $("#stbutton").click();
});
As for this page, I know it works in console. And jquery is definitely being loaded before it hits this line of code.
As @charlietfl pointed out, you're probably triggering the event before attaching the click listener to the element.
$(document).ready(function(){
   $("#stbutton").click(); //This doesn't work
  
  
   $("#stbutton").on("click", function(){
      alert("clicked");
   }); 
  
   $("#stbutton").click(); //trigger event after listening to it.
});
#stbutton {
  background: #000;
  width: 100px;
  height: 100px;
  cursor: pointer;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  
<div id="stbutton"></div>
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