This is only because you have become accustomed to industrial food production practices. Because you've been tricked early in life and learned that 'strawberry' doesn't mean the berry and you've just normalized this practice.
If you ever do any cooking of your own you'll know that things like Strawberry Jam is made from taking a pot of strawberries and adding other ingredients. It very clearly is not taking 1 strawberry and adding a pot of strawberry like flavorings.
The real issue is we have crappy consumer protection laws. Companies should be forced to provide truthful advertising practices. E.g. 'Simulated Strawberry Flavor Poptarts' (don't hide the simulated label in tiny print that nobody notices until after the purchase). Another major problem is downsizing packaging, e.g. Orange Juice in a standard size container that is filled only to 90% capacity.