Yes that is the way they are raised with old school morals
Like my wife is from Middle class family, with 4 sisters and all have 4 year degrees, my wife is Registered Nurse in USA and Philippines, she was 22 year old when I met her 2 years out of college and she was still a virgin. Pretty common in PHilippines from what I have seen.
I suggest to do you due diligence on Philippine, the culture and society in the Philippines, it will put you with a marked advantage. Personal suggestion, look for partner that come from good home and educated, dont waste time on partners with : Kids, No education, Come from broken home, or poor.