"You are bothering to do the interview because for one reason or another you're interested in the job." I'm interested in learning how other companies do thing

"You are bothering to do the interview because for one reason or another you're interested in the job." I'm interested in learning how other companies do things, what technologies people are looking for in the industry, what sorts of questions are being asked in interviews, and what kind of problems people feel are in the domain of a particular job title. I'm also interested in compensation trends in the industry. I can get all that information from a decent interview even if I walk away. Politely, of course! It's a matter of respect for each others' time.