I do the same thing
I also look to take out opponents star players, especially if they have lowish bravery, composure. I also look to "wind up" players with high aggression, but low composure.
Players with low fitness are always good to "pressure" and with hard tackling and closing down often, you can put them out of the game quite quickly.
I don't think it's unfair. It's a contact sport after all!! Well... used to be IRL
RL examples are plain to see. In recent matches, I've clearly noticed how much "physical" attention Cristiano Ronaldo has been getting. Noticably, it's been working and he's not been at his best.
So "Hard Tackling" players carrying a knock or with low bravery... Yay! :thup: