Well, I'm definitely not a pro. And I'm not above combining more than one take to make a complete recording. But I usually try to record an entire section at a time, not just one phrase, and I certainly have never punched in just one note!
There are practical reasons for this. Starting a new take at the beginning of a section makes for a seamless transition. I try to make my entrances in real time. I listen to the previous section thru the headphones and come in when it "feels" right. I would do the same for any subsequent takes, playing from where I left off and continuing to the end. In other words, I never try to punch in a section in the middle after I have already recorded the later sections.
This way, at least I'm not trying to adjust the timing after recording. And I don't have to deal with unnatural sounding attack envelopes or notes overlapping or getting chopped off early. If the entrances are good, it's nearly impossible to hear the transition from one take to the next.