Cheaper to send the whole machine to Apple for servicing? I worked at a company where most users had simple PCs with dust filters and it took 5 seconds to clean

Cheaper to send the whole machine to Apple for servicing? I worked at a company where most users had simple PCs with dust filters and it took 5 seconds to clean those when fans started ramping up due to accumulated dust. I can't really see how it would be cheaper to pause all work and send the machine somewhere else for cleaning. Heatsinks and thermal pastes, no-one really cared since they should be fine for years until the machine is replaced anyway.