>> candidates will be invited to schedule a first 45 minute behavioral interview with the Infrastructure Lead
Yes, go right ahead and filter out some (disclaimer before the rant: some, not all) of the best talent. The kind of potential employee that gets rejected due to perceived personality problems is exactly the kind of person who would tell management to shove a stick up their ass for demanding a 2 week deadline for a project requiring 3 months to execute properly.
Maybe if GitLab had hired the best talent, instead of the best "behavioral/cultural fit", at least one of their 5 backup systems would have been functional. Many people who are perfectionists in their craft, who would never have allowed this kind of failure to take place under their watch, come with abrasive personalities. If you only hire those who are submissive during the interviewing process, you will get exactly what you chose - people with no backbone to push back against unreasonable business expectations.
Case in point: would you want to hire me based on this comment of mine? Hell no! You're going to steer clear of me and give me an instant fail during a "behavioral interview", because you can't look past my belligerence to understand that there is value in having employees who obsess over the little things like having systems that do what the fuck they're supposed to do, rather than being able to give a conformant first impression full of social prowess. "Whoa, he used the word 'fuck' to hammer home his point; definitely avoid hiring this guy!"
tldr; Sometimes, people who are "talented" or "skilled" get to that point by being obsessive freaks who sit at home in the dark all night hacking away at stuff, with no social lives. The result can be someone who knows what they are doing because they invest all their personal free time into the domain, but consequently has absolutely no social skills to put on display.
shorter tldr; Businesses focus on the liability of a person without considering the potential.