I've taken a draw in the last round of a tourney when I was clearly ahead against a much higher rated player but there were still plenty of options to go wrong. It also guaranteed me a class prize and the ability to get home early.
Ideally, you play the best game you can and go for the win but there can be other considerations driving the decision. If you feel fine about it, that is all that really matters.

Hey guys, I am not too impressive of a chess player yet. My judgement isn't always perfect when I am full of energy. When I am falling asleep but winning, do I go for the win or take a safe draw?
I recently played a rated OTB game where I agreed to a draw on move 11. I wanted a draw going into this game- if I won or drew I would get 1st in my bracket. I was also extremely tired. My opponent was beating me at first, but made a massive blunder, which even someone at our level could see. I plugged the position into an engine, and it evaluated me as being up 5-6 points... I was afraid however. I was afraid I would be tired and hang a piece. You will see I have a good proportion of bullet and blitz compared to my other games- I am trying to play faster. My opponent in this game plays very fast and I already had used 1/5 of my time. Between the time pressure and my sleepiness, I was worried I would blunder something. Was I worried over nothing? Should I have played on and risked it?
the game (I played white)
my apologies for not knowing how to post a PGN...
1.e4 e6
2.d4 d5
3.e5 c5
4.Nf3 Nc6
5.Bb5 Bd7
6.0-0 Nxe7
my vastly superior development has blundered a pawn...
7.Bxd7+ Nxd7
8.Nc3 xd4
9.Qxd4 f6??
my opponent told me he imagined my e pawn was still on e5
10.Re1 Qe7
11.Nxd7 draw
so yeah. He was significantly higher rated, but skill wise we are just about equal.
tying for 1st + rating gain means I am not upset, but in a position like that when I am falling asleep at the board, should I keep going for the win?
apologies for long post...