In My Last Airline.
Incorrect, you are confusing a Decision Altitude with a Minimum Descent Altitude.
On a precision approach (ILS/MLS) the decision is made AT the DA, during the go around manoeuver a minor descent after the decision is made is expected and accounted for when the altitude is decided upon by governing authorities. This is why it's not uncommon for aircraft to lightly touch the tarmac during a go around from a CAT111B with Decision Alt Approach (which is often just 25ft above the tarmac).
On a Non Precision approach you have a Minimum Descent Altitude, which you may not descend below unless all the visual requirements for that approach are met.
Hope that helps.