Having run both trenbolone and nandrolone at very high doses, and produced milk with crashed estro from both, I can tell you that this statement is now and will forever be false.
I mean obviously if you're running high doses of tren AND nandrolone, then you're just asking to be milked, even if your estrogen is in the garbage
The relationship between estrogen and prolactin is well known, although complex
"Estrogen Feedback Mechanism: Elevated estrogen levels in men can disrupt the hypothalamic-pituitary-gonadal (HPG) axis. This disruption can lead to alterations in the regulation of various hormones, including prolactin. Estrogen can exert negative feedback on the hypothalamus and pituitary gland, which may result in increased secretion of prolactin."
"Prolactin Regulation: Estrogen can influence the regulation of prolactin secretion. While the exact mechanisms are complex and not fully understood, estrogen can modulate the activity of prolactin-releasing hormone (PRH) and prolactin-inhibiting hormone (PIH), both of which are involved in the control of prolactin secretion from the pituitary gland."
so for most people running moderate doses of one or the other, with controlled estrogen, they're not likely to experience problems (but it is still possible which is why it's recommended to have caber on hand). Running both, at high doses, you're just asking for nipple leakage and sides.
It's kind of like one person running 250 test/week and saying " i didn't have any bad estrogen sides", then another person chimes in "well I ran 1-2g of test/week and had horrible estrogen sides."
well yeah... sides scale with dosages. *insert surprised face*