Add this snippet to your Event Espresso 4/WordPress site and when you go to add a new event, the Address Question Group will be pre-selected by default.

address_select_new_event.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_action(
    'AHEE_event_editor_questions_notice',
    'my_select_address_for_primary_question_groups'
);
function my_select_address_for_primary_question_groups() {
    if( did_action(
            'FHEE__EE_Admin_Page___load_page_dependencies__after_load__espresso_events__create_new'
    )) {
      echo '<script>jQuery( 
        "#espresso_events_Registration_Form_Hooks_Extend_primary_questions_metabox input[value=\'2\']"
       )
      .prop( "checked", true );</script>';
    }
}