###Your problem with Vim is that you don't grok vi.
You mention cutting with
yy and complain that you almost never want to cut whole lines. In fact programmers, editing source code, very often want to work on whole lines, ranges of lines and blocks of code. However,
yy is only one of many way to yank text into the anonymous copy buffer (or "register" as it's called in vi).
The "Zen" of vi is that you're speaking a language. The initial
y is a verb. The statement
yy is a synonym for
y is doubled up to make it easier to type, since it is such a common operation.
This can also be expressed as
P (delete the current line and paste a copy back into place; leaving a copy in the anonymous register as a side effect). The
d "verbs" take any movement as their "subject." Thus
yW is "yank from here (the cursor) to the end of the current/next (big) word" and
y'a is "yank from here to the line containing