out of sight, out of mind; better to be ignorant than to know the upsetting truth; to get rid of something or get out of a situation quickly to minimise loss
Definitions (粵典–words.hk)
語句
比喻寧願失去一啲嘢，令心情好啲，過得舒服啲 figuratively, one would rather give up something for better feeling; literally: to be blind happily without rheum