Committing to what we want in the moment is simple, not easy.
It is far easier (not simpler) to make plans in advance, hold ourselves accountable, use guilt as a means to “do the right thing,” frighten ourselves a little (“If I don’t do ___, then ___”), and so on. I think we feel that we are our own worst enemy, and that it’s supremely important to protect ourselves… from ourselves. What if we succumbed to the wish (ooh, desire) of the moment, and did something terribly unsafe or unhealthy or irresponsible or stupid?
Committing to the moment means being fully present and attentive to whatever it is that arises, including our own response. This requires us to keep aside the previous plan, maybe ditch it altogether, make a new one? This requires a certain devotion to the moment, coupled with trust in our individual ability to respond correctly. In the absence of either, it is far easier to refer back to previous plans, ideas and concepts, notions, etc.
And yet, the truth is that we are dynamic beings, fully capable of making excellent plans, dumping them for better ones, and accomplishing fun, creative, meaningful results.