"That mountain is on fire. Here's your shovel..."
My experience growing up in an area where forest fires happen on a yearly basis is that there is a different cost/benefit calculus with regards to human safety that goes on in a typical forest fire versus a urban structure fire. Eg, one building in city gets started on fire and causes the whole city to burn can cause much more loss than letting the ‘natural’ forest burn and go through its historical ecological cycle.
That being said: The people I know who fight forest fires seem to enjoy it and look at it pretty positively.
[I'm a volunteer in a local rural area, at the last all-volunteer station in the state.]
[P.S. I missed closeparen's comment below. We think similarly]
Unfortunately the general pilot shortage and the longer fire season is starting to impact Cal Fire, leaving a few airtanks grounded without pilots. These pilots traditionally worked on a seasonal schedule: ~four months of heavy firefighting with minimal time off, with the rest of the year spent recuperating (aka "unemployment"). Trying to extend the heavy-work period (or even make it year-round) is burning people out.