so provided the aircraft POH says it is rated above 2g, you're fine
.. you miss Centaurus' point. The certification fatigue calcs (and, for older aircraft, this might amount to not much) are based on presumed usage of the aircraft. While the aircraft may be authorised to 60 deg bank .. and the limit load factor a little above 2g .. for a normal category aircraft there will be a presumption that 60 deg bank turns are of limited duration and infrequent application.
Think of fatigue like a bucket of water ... each time you pull g ... is like tossing a small cup of water out of the bucket .. or a larger one, depending on the amount and duration of the g ... when the bucket is empty .. you are on borrowed time ...
Centaurus, being an ex military pilot has no fear of manoeuvring .. he is just a little more conservative having not killed himself over a great many decades of flying.