Not all pay for work is monetary, but firefighting is still work.
And I just realized - maybe you hate your job. If that’s the case, go find something else you enjoy that happens to pay the bills. Life is too short to be spending your working hours hating life, and if you’re on this site you can probably find some sort of job (or start a business) that you enjoy and others find valuable.
https://www.quora.com/I-dont-understand-volunteer-firefighte...
Honestly it’s an odd example to pick because there are paid firefighters too - why would you need to pay firefighters if enough people are willing to do it for free?
The reason you need to pay firefighters is because society is work-centric.
The reason you need to pay firefighters is because a few people might give some of their time, but a fire department needs to operate 24x7.
When you can’t find enough volunteers in your society, how do you solve the problem of buildings burning down at a time no-one chooses to volunteer?
I’d rather do something more fun if I can pick and choose. Maybe race car driver? Or chocolate taster?
You might have invented electricity or the computer through ingenuity, but who is going to build the infrastructure that supports it? Who is going to build the poles in your suburb to get the electricity to you? Who is going to build the telecommunications infrastructure and maintain it such that if it breaks there is someone there to fix it?