I dont think parents allow that, they want doctor or lawyer high rank job :hmm:
If you told your parents that you want to study Islam because other knowledge are not beneficial for hereafter, of course, they would scold you and give you long lecture about benefit of knowledge.
But if you told your parents that you want to study Islam because you want to be Islamic scholar and use your knowledge for ummah, maybe, and In Shaa Allah, they would start thinking about it.
Yes, many parents want their children have job with high income in the future. But it doesn't means parents must be refuse their children wish to study Islam. Look at Islamic institutes or universities. There are many students there, and they study there with approval from their parents. I know they are approved by their parents because I know their study cost paid by their parents.
Young bro, I support you if you want to study Islam, but only with right intention, to use your knowledge for ummah. If you study Islam, you should ready to teach people. Maybe teach as teacher, maybe give lecture, maybe issuing fatwa, maybe write Islamic book or article.
If you study Islam but you don't have intention to use your knowledge for ummah, then you just waste your study time, and the worse is you waste your knowledge, like someone who study medicine but never become a doctor and never use his medical knowledge to help people.
Two of my uncles studied in Islamic school. One, who has passed away, worked in ministry of religion. After retired he still active in giving Islamic lecture. Another is an ustadz (Islamic teacher) who teaches people voluntary. Yes, voluntary without paid. But he also has knowledge of business, and he fulfill his family needs by his business.