Control+shift+B is the shortcut to hide/unhide the bookmark bar. If you unhide it, it remains visible, even next time you restart chrome. You can create bookmark folders. Then right click on the folder -> "Open all" or "Open all in new window". Etc. It's intuitive, efficient, and prominent ("Open all" is literally the FIRST item in the right-click context menu on a bookmark folder).
Also you don't even need to know a magic keyboard shortcut. On Mac at least, literally the first menu item under "View" is "Always Show Bookmarks Bar". (You can right-click on the bookmarks bar as well for a menu to keep it always visible, also intuitive.)
There's literally an entire Bookmarks menu, both in Chrome's menu and in the Mac menu bar. The third item is "Bookmark all tabs..." and below that is the list of all your bookmarks. You can also bookmark all tabs by right-clicking on the empty area of the tab bar.
Bookmark functionality is all over Chrome. It's there in every new tab page. Heck, a recent update brought a brand-new Bookmarks sidebar to Chrome as well.
Sometimes it's a legitimate complaint that features are too hidden... but in this case it seems like the poster hasn't bothered to even glance at the interface. This post makes utterly no sense.
There is a fix; add in about:config an item "browser.toolbars.bookmarks.2h2020" set as boolean False.