What's absurd about it? The process sounds perfectly feasible to me. If you can perform the procedure, then it will definitely allow you to unlock this phone through a tremendously tedious but entirely doable brute force process. Try five passcodes, reset, try five more, repeat until done. I'd feel sorry for the special agent(s) tasked with entering sequential passcodes until one works, but the process would only take a few days if done continuously, or about two weeks if you stuck to regular business hours.