Use of taser includes the need to draw it, not just then if it is necessarily 'discharged'. The implied and deliberate threat of use of taser can be enough to de-escalate a situ. Another example is if I drew (but did not use) my Asp friction lock baton to de-escalate a situ with a suspect, that would necessitate submission of paperwork to justify this.
If you read the police use of force policy, the two different uses of taser are covered within the need to record their deployment in this way.
I was never tasar trained, but I was an officer safety trainer for some 20 years. I trained CS, various batons, UDT and use of Speedcuffs. I have been in violent situations where I deployed all of these tactics.