I cannot watch the video as youtube is blocked at my office. But I can answer the premise.
OO is the norm because it is has immediate business value and is easier to teach to young people. Most programmers in the work place are produced from educational institutions. Educational institutions has competitive quantifiable
FP requires thinking in terms of calculus. This isn't hard, personally I find it much faster and easier.
Thinking in calculus does require some maturity, and possibly some analytical experience, young students may not find comfortable.
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This question can also be answered in terms of scale.
FP reinforces simplicity. Simplicity requires extra effort, often through refactoring, in order to scale or allow extension for future requirements. This is a mature approach that allows a clearer path forward during maintenance and enhancements, but it isn't free.
OO scales immediately with minimal effort. OO, particularly inheritance, strongly reinforces complexity, but scale is easily and immediately available. This is great until it isn't.
OO is the norm because it is has immediate business value and is easier to teach to young people. Most programmers in the work place are produced from educational institutions. Educational institutions has competitive quantifiable
FP requires thinking in terms of calculus. This isn't hard, personally I find it much faster and easier. Thinking in calculus does require some maturity, and possibly some analytical experience, young students may not find comfortable.
---
This question can also be answered in terms of scale.
FP reinforces simplicity. Simplicity requires extra effort, often through refactoring, in order to scale or allow extension for future requirements. This is a mature approach that allows a clearer path forward during maintenance and enhancements, but it isn't free.
OO scales immediately with minimal effort. OO, particularly inheritance, strongly reinforces complexity, but scale is easily and immediately available. This is great until it isn't.