"Counter attacks" and "Counter attempts to create an advantage against you" are always their own Defend application.
Though there are also some unique and broader defences that do not care about the action involved.
Stealth: Foil any attempt to pinpoint your location, seek you out, or find evidence of your passage.
Notice: Watch over an area to detect people trying to use Stealth or Burglary to infiltrate it.
Empathy: See through lies and deceptions to someone’s true intent.
Burglary: Make a building (or something else) secure with locks or traps. This includes foiling investigation efforts and blocking attempts at infiltration by others using the same skill.
The Overcome applications are less clear though. Stealth has "keep yourself hidden" and "keep other things hidden." Deceive has "bluff" and "disguise".
But other things have super broad Overcomes, like Burglary: "engage in theft and infiltration." Hiding your tracks, breaking and entering, picking locks, all fall under this.
I think it is also in part the fact that Athletics has extremely broad use, such that trying to narrow it down does more harm than good. Climb, sprint, swim, dodge, jump, how do you divide those up except with "Do things that involve moving your body"?