I am not sure whether the question applies to you, a friend or relative or just perhaps a general query.
A few comments that i intend to make represent my views and not necessarily the views of the majority of the medical fraternity.
I cannot relate, the information given in the NHS website to "medicine in it's human setting."
Low blood pressure........who has measured it and under what circumstances, a nurse, a doctor or perhaps the chemist and what were the measurements?
Low BP or hypotension is unusual in my experience except when one is afflicted by an acute illness.....diarrhoea, vomiting, haemorrhage or severe trauma (car accident),but I guess that you are not referring to these incidents.
One would need to know what medications you were taking and what on going illnesses were present at the time.
"Low BP with no symptoms"..........then who cares?....not dangerous.
"Low BP with symptoms".......one would need to be sure that the symptoms were due to the low BP and not just "assumed to be."
In my opinion hypotension is unusual in the general population and then of course, one comes to the salient point.......what can be done about it.
I hope that I have helped a little.