is it worth downloading all the windows 10 updates as i will never use them
It is about risk assessment. Do you have anything to loose, if you get infected? In the answer is no, then no, you do not need them. Like, if your FB account gets stolen, you will just create a new one, if your files get encrypted, you will just reinstall. It might be bothersome, but that is about that. It not like the malware will eat you alive.
Not to mention, it is about custom Windows settings as well. Most updates just fix problems in services, files, etc, so if you have services disabled, files blocked in a firewall or monitored by sandbox/hips, then they can not be easily exploited, even when not updated. Just look at workarounds in those security updates, they are actually better, because you are protected against future vulnerabilities, sometimes not fixed for years. As a matter of fact, I have not updated 1709 for several months and I was not concerned at all. I do not fix, what is not broken.