Not entirely accurate.
Gains disappear in a few hours only if you pump on an infrequent basis.
Erections are only spongy and soft if you over-pump or cause harm to your penis and the blood vessels. Most likely those are the guys using cheap hand pumps and not monitoring pressure or are ignorant to the effects of high pressure and become overly zealous because of being impatient to 'achieve' the trophy penis. When properly done pumping leads to firmer and longer lasting erections.
Permanent gains are indeed possible when you incorporate pumping with other traction devices and or manual stretching and exercises and without any damage done whatsoever to the penis.
Gains disappear in a few hours only if you pump on an infrequent basis.
Erections are only spongy and soft if you over-pump or cause harm to your penis and the blood vessels. Most likely those are the guys using cheap hand pumps and not monitoring pressure or are ignorant to the effects of high pressure and become overly zealous because of being impatient to 'achieve' the trophy penis. When properly done pumping leads to firmer and longer lasting erections.
Permanent gains are indeed possible when you incorporate pumping with other traction devices and or manual stretching and exercises and without any damage done whatsoever to the penis.
short answer "no"
gains disappear between a couple of hours to a day after.
also erections are soft and spongy
some claim permanent gains after years of routine, but the smart says that leads to overuse and damage