Bhikkhu have/are becoming just like anicient yogis or monks before buddha, they know the drawbacks of sensual pleasures, yet, they attempt wrong escape from this sensual pleasures. They try to escape from it via cultivation of meditation, while it can not provide right escape from suffering.
They can’t get rid of sensual pleasures because they can’t see the tilakkhana. So, they think they have SUPPRESS something they like and which is fruitful. Obviously it is struggle.
One only struggles to give up what is valuable. One wouldn’t struggle to give up worthless.