then you're going to have to do the math re: how much you're actually going to use
Sure, you're probably going to spray a couple seconds at the most, which would be like less than 30 kcal. Basically nothing that you'd really count, unless you're on a super-strict diet.
But the problem is that it's misleading. Uneducated shoppers might choose that brand specifically because "I'm on a diet", instead of buying a cheaper non-spray version. And/or proceed to put a ton on their food, without realizing avocado oil is almost 900kcal/100g.
"usually all have the same" isn't fully true either in my experience. Are you really going to eat just 1/3 of a candy bar? It says 100 calories in big letters, surely it'd be much healthier than the avocado oil bottle that says 120 calories per serving.
"Serving size" numbers are bullshit and should be banned.
It's mostly the tobacco causing health issues, not the wonderfully addictive nicotine. But yeah, it's a good thing that flavored cigarettes are banned.
Though it seems like big tobacco found a loophole on the first day, as you can still get menthol cigarettes in EU... it's just not as strongly minted as it was prior to the ban.