But are you really going to do that every single day for the rest of your life? That seems like an unhealthy and miserable way to live to me.
I don't find it miserable. It just makes me think. Like checking my bank account regularly to make sure I'm not overspending.
Also once you have lost the weight you don't need to be in a calorie deficit any more. If you kept eating in a calorie deficit you'd be losing weight permanently and obviously that's not the plan. So when you're no longer actively trying to lose weight, and you've spent months tracking what you eat, you'll know what your usual meals and snacks contain, they'll all be saved in My fitness Pal (or whatever app you use) and it only takes seconds. You don't need to never have a takeaway again or a meal out. You just need to look at it and know that most of the time you're making sensible choices.
And on that note, another thing is that you'll never lose weight calorie counting during the week but then having a break from it at the weekend. Because most people just eat back all the calories once they feel that they don't have to account for them. I learnt that one the hard way 