Interesting. I’m glad to see this (I saw something else by R’ Miller that said men only pray in Hebrew.)
The Chofetz Chaim greatly emphasized the importance of speaking to Hashem in one’s own words every day at length (he even said in Biur Halacha that a Torah scholar should spend an entire day doing so once a week). See the quote about daily prayer in one’s own words here:
“In summation, all the many calamities that come on us and that we are not saved from them is because we are not screaming and outpouring in prayer over them. If we would pray and would pour out before HaKadosh Baruch Hu, certainly our prayers and supplications would not return empty. And it’s not enough for a person to pray the shemonei esrei three times a day, rather a few times per day, a person needs to pour out prayers and supplications in solitude, in his house, from the depths of his heart. Because the three prayers (shemonei esrei) are already fixed in his mouth and he doesn’t take them to heart so much. But if a person would contemplate in solitude and make a cheshbon hanefesh on his personal situation, his great poverty and his many toils, and for all this to live on crusty bread and water, then he will pour out his heart like water in front of Hashem, yisborach, and the prayer will go out with deep kavana and with a broken heart and a lowly spirit. A prayer like this will certainly not return empty. And then when his soul is bitter on him, on his situation and his weak standing, and he drops supplications before HaKadosh Baruch Hu, he should also remember the great pain of Hashem yisborach, because he also, so to speak, does not have rest. In all our suffering He suffers…” (Chafetz Chaim – Likutei Amarim ch.11)