Question on coolant vs lubricant when milling & the need for each

I'm trying to get a clear understanding of the need for coolant vs
lubricant when milling.

In my scenario, I am using a Sherline Mill, cutting aluminum with a 3/16 or
1/4" end mill. I tried using a 1/8" cutter but that was a disaster so I'll
stay away from that for a while.

Now that you know what I am cutting here's my question:

Am I correct in my understanding that the primary objective of any cutting
fluid is to both keep the cutter from overheating and also to move chips
away from the cutter? (Perhaps not in that priority)

Now, based on my understanding of the above, correct or incorrect, is there
any reason that I cannot use one of those really neat vortex cooler devices
with a source of compressed air and keep the workspace clean? This would
both cool the cutter and bow the chips away. I assume that if this is not
the proper thing to do that there must be good reason....

I know that the sherline is a small mill and that aluminum is a soft metal
as metal goes. Am I making a big deal about nothing given the small size of
my mill, cutter and block I am able to cut with this size of mill?

I'd welcome some feedback.

Thanks,

Eric Mack