Which is almost never. Oh sure, these teams get used a lot, but they're very seldom actually needed. But if you give cops a hammer, they tend to treat everything like a nail and that's been the case with the militarization of police.
Because no one got hurt you say they weren't needed.
The threat of overwhelming force is a great deterrent. Weakness gets people killed.
In New Brunswick three RCMP officers were killed and two more wounded by a single gunman for the simple reason he was better armed.