Why ? If he ends up being similar to Sasuke like Boruto is to Naruto then it will only make Sarada look cooler because the parallel will make her be more like Itachi
Because Sarada already has too many haters, and most of these haters constantly say Sasuke should've had a son instead of a daughter.
If Sasuke happens to have a son in the future, it will be just another reason for people to hate even more on Sarada. I'm also considering the fact that the Naruto manga is extremely sexist. In Naruto, male characters are usually greater than female characters. Hypothetically, if Sasuke had a son, chances of that kid end up being stronger than Sarada are big, consequently, he would be more liked by the bandwagooner-sexist fanbase than Sarada is.
Besides, I'm perfectly fine with Sarada. Why would Sasuke have another kid anyways?