Metal spatulas are also just better. Plastic or silicone ones are like safety scissors, so of course you need non-stick pans. I don't run into sticking with cast iron and a metal spatula.
You are using them for the wrong purpose... Plastic spatulas are useful for sauces, batter, anything of that consistency. Of course, if you are already holding it in your hand and you need to flip a pancake, there's nothing wrong with it...
Similarly, there are plenty of different metal spatulas for different purposes, like decorating cakes or cooking on one big stove-top (as opposed to individual burners, that's something you see in the restaurant kitchens more often than in private use). And, again, you don't have to use any specific one for any specific task. My mom never had a spatula and did everything with a single chef knife she had, and it still worked for her.
Similarly, there are plenty of different metal spatulas for different purposes, like decorating cakes or cooking on one big stove-top (as opposed to individual burners, that's something you see in the restaurant kitchens more often than in private use). And, again, you don't have to use any specific one for any specific task. My mom never had a spatula and did everything with a single chef knife she had, and it still worked for her.