@222namechange Interviewers aren't mind reading but, in an academic context, trying to work out how responses map into 'teachability' and point to potential. It is not an exact science and cannot be quantified in the same way as right/wrong-type questions (the tests will do most of that). Interviewers will have some sort of scoring table and criteria in order to compare data. I mention the above from the pov of several years' worth of entry to higher education interviewing, not from having done school interviews. Some school interviews seem to follow the HEd model with which I am familiar.
The terms 'weird' and 'strange' may be part of the issue. What may seem weird to someone (perhaps because they had not anticipated it or cannot be measured in absolute terms) can be considered a perfectly reasonable probing question by a school. It depends on what they are looking for.
Ultimately, interviews are useful in that they help to match individuals to environment. If one finds a school's approach unsuitable (because it is perceived as unfair, strange, weird or unreasonable in any way), then that surely makes declining an offer much more straightforward.