Sure, web applications have different requirements and might warrant the use of more JavaScript than a website does. But one of the biggest problems nowadays IMO is that many developers choose these fancy technologies also for websites, just because they like them, without thinking too much about how that affects the user, and it does so in a mostly negative way. If you are building a website for the local bakery HTML and CSS backed by any CMS probably suffice, and there is no need to add the complexity of client-side JavaScript and SSR (or whatever) to it.
Sure, web applications have different requirements and might warrant the use of more JavaScript than a website does. But one of the biggest problems nowadays IMO is that many developers choose these fancy technologies also for websites, just because they like them, without thinking too much about how that affects the user, and it does so in a mostly negative way. If you are building a website for the local bakery HTML and CSS backed by any CMS probably suffice, and there is no need to add the complexity of client-side JavaScript and SSR (or whatever) to it.