gform_post_submission hooks executed after confirmation redirect

I typically like to set the confirmation page to another WordPress page but this doesn't allow for the use of the gform_post_submission hooks as the confirmation redirect happens before the hooks are called. Is there a good reason for this? Essentially, if I want to hook into the post submission I have to use the text confirmation message. In form_display.php on line 75:

header("Location: {$confirmation["redirect"]}");
do_action("gform_post_submission", $lead, $form);
 do_action("gform_post_submission_{$form["id"]}", $lead, $form);

Why would it not be:

do_action("gform_post_submission", $lead, $form);
do_action("gform_post_submission_{$form["id"]}", $lead, $form);
 header("Location: {$confirmation["redirect"]}");

I looked over the forum best I could but didn't see anyone mention of this nor can I imagine why you'd want to prevent this hook if the confirmation message is a redirect.