Yes, these are deceptive. You're typically getting all of the sugar, but none of the fiber along with it that slows digestion (along with other benefits). Eating an apple and drinking apple juice are very different in terms of sugar content and the resultant insulin spike.
That said, I doubt anyone has ever experienced negative health effects from eating too many apples.
Edit: wait, so you ate ~53 apples (googled average weight, came back at ~.15kg)? I call BS.
And consider that if one just eats 3 apples per hour, than in 16 hours that gives 48.
You turn into an apple.
At least, according to all nannies & parents.
As far as I understand, the fiber should still stay in the juice because I did nothing to take the fiber out of this mixture.
But even if the fiber stays intact you're going to drink and potentially overdose on a smoothie more easily than a while fruit.
http://www.sciencealert.com/here-s-what-fruits-and-vegetable...
Honestly, I think it's probably just easiest to limit carb intake overall. Don't bother with the nonsense about subtracting fiber and all that, just set your carbohydrate goals for the day and stay under that. Sugar-heavy foods tend to get naturally eliminated in such a routine because the calorie-to-satiation ratio sucks.