I just like it that way and never had a reason to re-train myself.
Don't force yourself into "best practices" needlessly. Find the way that works best for you - and get hacking!
Double-click to select a word, triple-click to select a line. Just start typing to replace selected text. No conflation of cutting a string in to the clipboard and deleting it. Click-and-type editing is nice. I only use Vim when I want to reformat text with its macros.
I've done the timing also and in some cases I've found that Vim gets me to where I want to be orders of magnitude faster, but seldom (if not ever) have I found it to be slower than a regular editor, perhaps with the exception of the most basic of basic editing needs (and even then Vim is probably faster).