Is it? Am I, as GM, taking a risk to my character? Am I, as GM, weighing all the option available and trying to meet my character's goals alongside my goals as player? Do I not need, as player, to have a fair grasp of probabilities to determine the riskiness of my action declaration?
As GM, to adjudicate, I have to determine if the outcome is in questions. That's not hard, I could, according to the DMG, default to 'yes.' Then I ask for a check. Again, according to the DMG, I should be asking for an ability check, so I only have 6 options. The player should be suggesting a proficiency, if one applies, so that's a pretty easy yes or no. I set a check -- the DMG again recommends that almost all checks be 10 (easy), 15 (moderate), or 20 (hard), and that's according to the fiction, so should be easy to pick if the thing attempted is easy, moderate, or hard. Then the player has to role, the mechanics tell me if it's a success. I narrate the oucome according to the dice. The hard part of this might be the part where I decide how I narrate a failure -- fail forward, success with complication, or no progress.
This conjecture only applies if you really think the players do not care about what's going on and not declaring actions with full intent. IE, that the situation is one where the action declaration is trivial for the player but complicated for the GM, and I really can't come up with a non-ridiculous example of this.