Isn’t those the same?
Here all chicken leg related costs the same anyway (except the feet but fortunately I rarely see that, people LOVE it and I can’t stand it :D))…
Yes, there are options but it’s individual if it’s a good idea to lower the costs. If one can afford the thing they fancy, they probably won’t give it up. And these weren’t luxury items for a normal person in a normal country. I obviously wouldn’t buy beef as I can’t afford it (wow, the price you wrote, that’s low!). But I almost never eat chicken as I prefer pork even if it’s more expensive (but it actually satiates me and it’s way more convenient. and it’s available unlike beef that is only in bigger towns and cities). So there are many factors to consider, of course you know that as it’s obvious.
Many people ADORE avocados. That’s why. Why I buy butter despite it’s a luxury item and I am super poor? Because it’s lovely in many situations and I would feel miserable without ANY 
I drink coffee too, waste of money, I should stop it…
But I am just a weak mortal.
Well yes, amounts may be lowered, I do that with the items where it’s possible. I can’t lower my amount of meat though.