I like the "at a glance" functionality that the various APIs provide. I can view all relevant information on a single page without having to click through different apps. I just set this as my homepage on chrome and it's like bookmarks on steroids
Bookmarks are cool and all, but having the ability to tap (if on mobile) the link or click on it visually is important. For example, I access my local dashboard via Wireguard on my phone, I can then tap the service I need to access locally. IMO, that is much nicer than hitting the browser's menu to find the bookmark and then clicking on it.
Aside from that, if you are like me and have hundreds of bookmarks, and a significant other less technically savvy as you are and are visual, then having a dashboard to go to makes it a lot easier!