[BlueSky]

Your trainer wants you to get lots of protein because it is required for building muscle. Resistance exercise breaks down muscle, which gets rebuilt stronger after exercise. But protein is required to make this hapopen. Which is why drinking a protein shake after working out is a good idea. But there is no point in consuming more protein than your body needs to maintain itself and build muscle. Much of the excess just gets converted to glucose. It is an expenseive source of glucose. And it increases your blood sugar.

As you are working out at the gym, you probably need about 1 gram of protein per KG of body weight per day. For you, this works out to 76 grams of protein a day. Count up all the protein in your food. As agheneral rule, protein food (chicken, meat, fish etc) is about 25% protein. So a 100 gram steak contains about 25grams of protein. And don't forget to include the protein in milk, eggs, bread and other processed food. Add to this the protein in your post-workout protein shake. If the total exceeds 76 grams, having extra protein drinks will just be a waste of money.

Adequate protein normally accounts for about 20% of the calories you need to maintain your weight. You have to get the rest from fat or carbo. You can't reduce both of them at the same time because you will lose weight. IMO, it makes a lot more sense to get the bulk of your calories from fat. It helps you burn fat for energy, and it is easier on your blood sugar.