I can see how these alternate ways of interacting with tiddlywiki may suit you, and others. Whilst I am quite happy with the interface it really is important to know it is easy to adapt.
Within the community we have sidebar editors, full screen editors, interactive forms, previews inside the editor and outside the editor, additional multi-line fields and more. Wether you like using the mouse or only the keyboard, autocomplete and in editor tools, WYSIWIG or section editor. Codemirror with its line numbers and advanced toolbars. Others use editable todo lists, modals or open in new/tab window.
Now other plugins or layouts such as streams, two or three story rivers even free floating tiddlers and Mentat, fit other ways of interacting with tiddlywiki such as kanban or even from a timeline or a calendar as the organising principal.
And then there is the standard text area editor, there have over the years being a range of browser based addons that support text area editing, before Codemirror got so advanced I used a tool that allowed me to edit text areas via my editor of choice Notepad++ and someone recently made one to edit tiddlers through VS Code Editor (untested by me).
What device you are using also has a big influence, mobile, touch, tablet or my common use multi-screen desktop. Each has its wants and needs and from what I have seen every one of these has being done.
Many open source editor projects can be brought into tiddlywiki with a little know how, so we are spoilt for choice.
I think this is why you see people sticking to the default mechanisums, because a lot of invisible design work has led to where tiddlywiki is but diverging from it is possible.
I have a project 95% of the way to full window management from the sidebar or an index window now made possible with new parameters on WidgetMessage: tm-open-window and WidgetMessage: tm-open-external-window if there was sufficent interest and demand I could lead a project to develop it.
There are so many possibilities to bend TiddlyWiki to your will.