The best interviews are designed not to filter out bad candidates but rather to allow good candidates to demonstrate that they are good. The best companies know that and design their interviews in that spirit.
Some technical test interviews appear pointless to experienced candidates because they are designed to give an opportunity to someone without any experience to show that they know enough to get started. That's how some companies can hire people without work experience.
Many (most?) companies are simply bad at hiring and use poorly designed cargo-cult test interviews. They have a vague notion that more successful companies use test interviews so they try to do the same, only without designing an actual effective hiring process. As a result, their hiring is essentially random - they interview some people, which they put through a test interview ritual, and then hire a random selection of these people. Even if you can get a job at such a company, would you want to work somewhere where you'll end up with randomly selected colleagues? These also tend to be the companies that have high employee turnover - they have to let underperformers go to compensate for their random hiring, and the best people leave because they don't like their randomly selected team.
If you have a realistic view of your own skill and fit for the role and the interviews don't make sense then either you're overqualified or it's just a bad company or both, and you wouldn't want that job anyway.
Some technical test interviews appear pointless to experienced candidates because they are designed to give an opportunity to someone without any experience to show that they know enough to get started. That's how some companies can hire people without work experience.
Many (most?) companies are simply bad at hiring and use poorly designed cargo-cult test interviews. They have a vague notion that more successful companies use test interviews so they try to do the same, only without designing an actual effective hiring process. As a result, their hiring is essentially random - they interview some people, which they put through a test interview ritual, and then hire a random selection of these people. Even if you can get a job at such a company, would you want to work somewhere where you'll end up with randomly selected colleagues? These also tend to be the companies that have high employee turnover - they have to let underperformers go to compensate for their random hiring, and the best people leave because they don't like their randomly selected team.
If you have a realistic view of your own skill and fit for the role and the interviews don't make sense then either you're overqualified or it's just a bad company or both, and you wouldn't want that job anyway.