Too bad you prefaced this with 'Americans'. The rest is probably true. I feel some people love the feeling of power when they are interviewing someone.

If someone can not answer my trick question I want to know why not and what question can they answer that I don't know.

I am looking for people better than me and the inability not to answer my favourite question may not mean they are not better.

The ability to answer leetcode or build something great, from scratch, are without a doubt, not the same thing.

The only unfortunate thing, is many people are bullshitting about their achievements and expertise and leetcode does tend to filter out the worst of them quickly.