To answer the first question: no, and the second question: yes.
Endurance measures the amount of data you can write and overwrite. Retention measures the calendar lifetime of data which has been written. An SSD which is unplugged and sitting on the shelf is a time bomb. It's due to leakage. It's strongly temperature dependent, but leakage will inexorably occur even at room temperature or below.
It would be foolish to count on data retention for more than 1-3 years on an unplugged SSD. It doesn't have to be that poor, but there is a definite tradeoff between bit density and data retention. There are microcontrollers whose flash memory is absolutely guaranteed to retain data for 10-20 years. The use case there is very different. They are basically programmed once and then expected to operate without attention for a long time.
Not that even 10-20 years is particularly impressive. Good quality enterprise tape can match or exceed that.
In comparison, fresh disk drives which are written once or a few times and then unplugged will generally have their data perfectly intact and readable 5 or even 10 years later.
So in summary, though "stark raving mad" is a bit harsh, I would say "highly ignorant" is appropriate.