Some of you fellas are suffering from the Stockholm syndrome! If a captain feel he might need the extra 20 min, then it is his prerogative.
Contingency fuel is intended for use after the browser has been disconected. Not saved to hold over dxb. If you have saved it, well good on you.
No one looks at how much fuel one actually saves enroute by requesting directs and block climbs where possible.
The extra fuel he brought cost 4% per hour. Typically 25% of the uplift to carry it. So for 1 ton extra he will burn 250kg. It is very easy to save this fuel enroute, hence it cost the company nothing and the captain is happy. Whats the big deal?