I try to approach things differently: why do people disable javascript? Is it because of security? There are ways to disable javascript only from third parties,

I try to approach things differently: why do people disable javascript? Is it because of security? There are ways to disable javascript only from third parties, for example, or disable certain functions (e.g. prevent alerts (natively in Chrome, or browsers extensions). Screen readers should be able to get the current state of the page, and not read from the 'source'. I can see some advantages of using javascript e.g. less load for the server to render things, it just becomes a directory host.