Growth mindset is hard to achieve. Humans tend to look for comfort and stick with it until something happens. No one really wants to get out of their comfort zones until they are forced by an event or a difficult situation. Rarely have I ever encountered a person who wants to change something and actually do something about it, though it is still possible with the right approach and the right support.
I do not think that it is that hard to achieve a growth mindset. Once the person is open-minded, it is easier for him to develop a growth mindset. I believe a growth mindset is a mindset that is focused on adaptation to the situation and adoption of new information and trends. If one knows how to adapt and adopt methods in every situation, this person can be said to have a growth mindset.
It is established that people are willing to leave their comfort in exchange for high-paying services/jobs. This is the reason why there are lots of OFWs and new entrepreneurs out there. People just don't venture on the world that is unsure of the result. And those who are skipping opportunities because of the said comfort are just lazy people who don't want to work.