In the case of this singular bike the answer is easy. Prolly had wheels, a micro shift group set and a frame to review. To save time and make the result incomparable to anything he knows he changed all the important variables at once and took some fancy pictures in the dessert.
Real world use cases for mechanical disc brakes
Quicker to setup when toying around with different lever/bar setups
Harder to get wrong if you are not used to setting them up or want to go to a shop all the time
Cooler choice of levers
Easier to handle when having to take apart the bike for travelling
Hydraulic levers are often ugly and more importantly big. This is a problem for smaller people. Better braking is worth nothing if you can’t use the levers properly.
You noticed that the bike shop must've stripped the banjo on your SRAM hrd levers, it's never been great anyways and you don't want to buy a whole new group set or another badly designed lever, so you get discounted mechanical levers plus some bb7s ...
In the case of this singular bike the answer is easy. Prolly had wheels, a micro shift group set and a frame to review. To save time and make the result incomparable to anything he knows he changed all the important variables at once and took some fancy pictures in the dessert.
Real world use cases for mechanical disc brakes
Feel free to add to the list