That part is totally wrong, it implies nothing. It simply means that he saw the ball grounded meaning that no one was between the ball and the ground but he wanted to check the particular action of grounding the ball. As for the rest, he didn't ask what you suggested because he didn't want for the TMO to check all parts of the build up, referees used to do that in the past, particularly during the 2015 RWC, but it was one of the reasons behind unnecessarily lengthy stoppages. In this case the only part that the referee wanted to check was the action of grounding and he asked for that which is exactly what World Rugby wants, that referees make an on field decision try or no try and ideally limit the TMO to a particular action.