Well yes, you surely came across as an asshole but I admit you have a point here! I am a new member but I have been growing for about 3 years now and I know some people in here have been growing for more than like a 100 years, I know
I can assure you it is not a copy paste. I assumed he has good lighting because of a few reasons, his plant looks healthy other than this browning issue, it has good growth for an 11 days old plant and it is stubby and not stretching by any means which might indicate that a good amount of light was used on it. So there is my reasoning for assuming he had his light dialed in.
Now what made me comment on his post? It is because I struggled with this same issue at the very beginning of my growing experience. These same damn brown spots on the lower leaves. At the time I had everything optimized, my lighting, the temp, the PH and the PPM (or that is what I thought at the time). I tried every damn adjustment and nothing worked. As all beginners, at the time I stuck with the "beginner" recommended nutrient concentrations which was exactly my problem. I doubled, yes doubles, my PPM and the problem went away and didn't see it ever again.
So what I'm saying is, if everything is optimized, I would assume that this is a nutrient deficiency and not a PH issue. But anyway, if it will make you happy, I will stop commenting in this thread.