True, I can sympathize with that notion. However, we've seen Boruto post time skip in some capacity. He seems to be a strong individual. Son of Hinata and Naruto trained by Sasuke Uchiha. Its only right for Himawari to be nearly as strong as him considering she has the Byakugan.
The only problem with that logic is the fact that Boruto is already established as a shinobi, unlike Himawari. We don't even know if Himawari is even going to be a ninja. The anime has especially hinted that in the modern age, less kids are becoming ninja and the peaceful era is allowing kids to look at other career options.
Furthermore, Himawari is already 10 - 11 years old. If she hasn't enrolled in the academy by now she probably won't considering that kids usually enroll at about 8 years old and graduate when they are about 12.