He had this feeling the more he dug into the physical body potential the better the benefits in the long term. With his and Wang Yue's physique at present, it was impossible to face any depletion of Qi and blood as such they could continue to practice at their own pace.
He just felt it would not be a smart move to have Wang Yue take the exact same path he did. It could become a hindrance later on.
But even so, he couldn't just let her give up strengthening get physical body when she had the chance. It was among the best life saving means available.
People with strong physique are difficult to kill and even if they used some secret skills the strain on their body would be negligible.
He threw the thoughts out of his mind for when they left the ruins. For the rest of the time, since she was under his protection, following his plans was the key.