I'm willing to bet more people are harmed by SWAT teams than by heavily armed criminals using the same class of gear.

A patrolman would've been more than sufficient for this.

EDIT:

Just to make this painfully obvious...had he turned around quickly with a mouse in his hand, they quite possibly could have drilled him. Is that sort of risk really something we're okay with?

EDIT 2:

For the downvoters--notice that I said "same class of gear". How many criminals are actually busted carrying fully-automatic MP5s, assault rifles, shotguns, and body armor?