Was anybody interested in Hook's works back then in the 1600's? In those times they were very busy with survival, why would people care if there is such a thing as cells?

It seems like there might be some confusion in your question. Robert Hooke, the scientist who discovered cells, was active in the 17th century, which is the 1600s. However, it's important to note that this was a time of significant scientific discovery and progress, not just survival. This was the era of the Scientific Revolution, when many of the foundations of modern science were laid.

Hooke was a member of the Royal Society of London for Improving Natural Knowledge, which was one of the first scientific societies and was composed of some of the leading thinkers of the day. His work, including his discovery of cells, was of great interest to his contemporaries in the society and the broader scientific community.

As for why people would care about the discovery of cells, it's because this discovery was a fundamental breakthrough in our understanding of life. Before the discovery of cells, there was no understanding of how living organisms were structured and functioned at a microscopic level. The discovery of cells opened up a whole new world of biological research and understanding, and laid the groundwork for many of the advances in medicine and biology that we take for granted today.