Why would that be a bad thing? 
Personally I would much rather see a GNU/Linux desktop that looks somewhat macOS-like ─ than one that looks like MS-Windows, because…
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At least macOS is a UNIX ─ albeit that it’s the least UNIX-like of all UNIX systems; and…
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Too many desktop environments are trying to look like Windows out-of-the-box, with as a result that this is attracting Windows users to GNU/Linux who want their system to not only look but also behave like Windows.
There is a Plasma widget that allows you to create a cascading menu of hyperlinks/bookmarks. If it’s not installed by default, then it’s bound to be available from the repository or from the AUR, and I’ve even seen it offered for download at store.kde.org, which is a website with themes, wallpapers, widgets, et al.
Hmm… 
If you’re going to go with GNOME ─ which is one of the most restricting and definitely non-Windows-like desktop environments ─ then you’re going to be badly disappointed, my friend. 