Some of the countries in South Eastern Asia are experiencing insecurity problems. Terrorists, separatists and armed religious groups are attacking some of these countries. Entrepreneurs are always attracted to countries where their lives and business is secured.
I think you're overstating the security challenges faced by these countries or you're mistaking them for Middle East Asia. Yeah, I agree the security in south-east Asia is not as that of the Europeans and North Americans but they're not as bad as you say.
In 2022 ASEAN (Association of Southeast Asian Nations) recorded $224 billion in FDI (foreign direct investment). This is to show that foreign investors are not scared of doing business in the region, They are one of the fastest growing regions economically.
if you were an entrepreneur, would you invest in this land?
It depends on a lot of things like, the kind of business, the access to raw materials, favourable policies etc. There are businesses that would not thrive in specific regions because of various reasons. If the business or company i have would excel in the region i would defininatly do business there.