It's very rare that people intend to be racist. Rather, they have intuition of what a "good programmer" is in their head, which is subjective, and thus more likely to be discriminatory. If you give them an leetcode question and a rubric to grade their performance, it's hard to deviate from that rubric to much unless if you're intending to discriminate.
>Does a biotech company make their interviewees do lab work live?
Not biotech, but according to my cousin, pharmaceutical research interviews are even more arbitrary. He had chat with 5 employees who asked questions about their own rather esoteric specialties. Most of the questions were completely unrelated to the work that he ended up doing, and my cousin thought that the interviewers themselves were unlikely to be able to answer each other's questions. Unlike leetcode, this isn't something you can predictably study. It just so happened that the labs my cousin had worked in happened to specialize in those same niches. There are so many qualified postdocs that want to move to industry that interviewers can afford to be picky.
This is probably very dated, but when I worked in biotech the interview process was just about 100% trying to find a "culture fit" (to be fair, in an industry about a thousand times more diverse than software) and politics. If the hiring manager brought someone in then you assumed it was on them to have screened for competence, and you wanted to figure out which candidate you'd like to work with, and/or figure out which candidate was favored by which person in power so you could vote advantageously.
>Does a biotech company make their interviewees do lab work live?
Not biotech, but according to my cousin, pharmaceutical research interviews are even more arbitrary. He had chat with 5 employees who asked questions about their own rather esoteric specialties. Most of the questions were completely unrelated to the work that he ended up doing, and my cousin thought that the interviewers themselves were unlikely to be able to answer each other's questions. Unlike leetcode, this isn't something you can predictably study. It just so happened that the labs my cousin had worked in happened to specialize in those same niches. There are so many qualified postdocs that want to move to industry that interviewers can afford to be picky.