Do the sciences of medicine, engineering, and industry fall under the term of fiqh (Islamic jurisprudence) in religion?

Question : Honorable Shaykh, may Allah’s peace, mercy, and blessings be upon you. Are medical sciences, such as medicine and engineering, part of gaining knowledge of Allah’s religion?

Answer : These matters are not part of gaining knowledge of Allah’s religion, because a person does not study the Book and the Sunnah in them. However, they are matters that Muslims need. For this reason, some scholars said that learning medicine, engineering, and similar fields is an individual obligation (fard 'ayn). This is not because they are part of the Shari'ah, but because the interests of the Muslim community cannot be fulfilled without them.
Therefore, I want the brothers who study such fields to intend, in learning these sciences, to benefit their Muslim brothers and elevate their Islamic community. The Islamic community is now in the millions; if it utilized such sciences for what benefits Muslims, there would be great good in that, and we would not need to extend our hands to the disbelievers to obtain our luxuries, or even our necessities at times. If a person intends with these sciences to carry out the interests of the servants of Allah, they become a means of drawing near to Allah—not for their own sake, but for the intention behind them. However, they are not fiqh in the religion, because fiqh in the religion is knowledge of Allah the Exalted’s Shari'ah rulings and His decrees, and knowledge of Allah the Exalted, His names, and His attributes, as we mentioned in the first discussion.