Guru Sahib was still guiding his sidki Sikhs - Bhai Makhan Shah. This 26 years is leela of Guru Sahib that we cannot explain. Why did Guru Arjan Dev not take up arms against Chandu or the Moghals? Why leave it to his 11 year old son?
10 jame of Guru Sahib but we Sikhs were and still are a minority in Panjab, never mind the despotic state of India or the world.
The question you ask, can only be asked to the Guru really.