Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?

(N/A) Sexual reproduction involves the fusion of male and female gametes. This process allows for the formation of new genetic variants through the recombination of $DNA$ from two different parents. These variations enable individuals to adapt to changing environmental conditions,thereby increasing their chances of survival.
However,this statement is not always true. In certain stable environments,asexual reproduction can be more advantageous. For instance,organisms that are well-adapted to a specific,unchanging environment do not necessarily require genetic variation. Furthermore,asexual reproduction is a faster and more energy-efficient mode of reproduction compared to sexual reproduction.