You're absolutely right about the time scales and I think the graphic makes more sense if you factor that into the message.

Can I lose 50 lbs today? No, that expectation would bring suffering.

Can I undo that gluttonous trip to the buffet yesterday? No, that expectation would bring suffering.

Can I go for a run right now? Yes, if I have everything I need to do so.

It gets a little more interesting when you're talking about the near future...

Can I go for a run tonight? Maybe... It depends on what happens between now and then. Sometimes legitimate obstacles appear and I'll suffer unnecessarily if my expectations don't match that reality.