kdasari
Śrī Matre Namaḥ,
From this post, Guruji's quote
So forget what people say. I asked Divine Mother Herself, in my meditation, this question: “Will you harm someone if they take a Meru home without initiation?” She said, “I will not harm.”
If keeping a Meru at home without initiation will not bring harm then I think drawing Śrī Cakra by an uninitiated person won't bring any harm either.
If drawing additional triangles or intentionally drawing the triangles wrong will bring harm or not is totally a different question. Only advanced practitioners of Śrī Vidyā here can answer.
I have gone through the time stamp you posted. What Haran Aiya garu said could be true that it is mentioned in Yogini Hridaya text that only initiated people can draw Śrī Cakra but then you will find in some other text that you are not supposed to keep a Meru without initiation and you need to follow several rules and regulations to keep a Meru in your house like daily puja and minimum one parayana of Lalitā Sahasranāmam (LS) etc.
Guruji made Śrī Vidyā and Devi accessible to everyone removing the fear around the practices and not following the strict rules that were laid down by other schools and teachers. And there could be several reasons for having strict rules, the obvious one is the enormous power and prosperity Śrī Cakra brings to people which they will abuse to harm others and themselves.
It is always better not to mix teachings from different teachers. It is better to have faith in Guruji and practise, nothing will happen. If you don’t have faith yet as you are not initiated then you can do practices which don’t need initiation like See Goddess fast here or here.
Śrī Gurubhyo Namaḥ