Guru Nanak was against renounciation as a way of mukti. He was a holy figure and his family understood his reasons to leave and promote Sikhi. He used to meet his family in between journeys. Siddhas asked the same thing & Guru Nanak said- Page 939- I became a wandering Udaasee, searching for the Gurmukhs. I have adopted these robes seeking the Blessed Vision of the Gurmukhs. Guru didn't leave his house to find God but to form community.