I'd rather spend a year learning Python or Go or whatever, instead of spending a year practicing interview questions. I never realized that some people put as

I'd rather spend a year learning Python or Go or whatever, instead of spending a year practicing interview questions. I never realized that some people put as much effort into practicing interview questions as I put into learning how to actually write software. Does this mean technical interviews, even a structured interview, are completely useless? I.e., if you follow an interview script, eventually candidates find out about your script, and then it's useless.