Because of the lack of knowledge to invest in bitcoin make bitcoin not for everyone.
I completely disagree with your thoughts, not only bitcoin but any investment, job or field with no knowledge, what can you do? You will not be able to do anything anywhere without knowledge, knowledge is a must if we want to start anything.
Bitcoin is for everyone, but whether people embrace it or not depends on each person. Like the saying goes, "when people really want something, they will definitely find a way", as long as they have determination, they can do it.
Many people have the misconception that bitcoin is only for tech-savvy people. That's not true, Bitcoin is for everyone, even those who know nothing about technology, as long as they have passion and are eager to learn, technology is not a barrier.