The Foxes, who started the day in fourth, rose to the summit on goals scored, although QPR can displace them on Wednesday evening when they host Brighton.
City's fifth win from seven league games left Pearson pleased, even if he refused to be drawn too much on being top of the pile.
"I'm not bothered, not bothered. It's great," he said.
Lloyd Dyer's close-range effort put Leicester ahead on 16 minutes and David Nugent's penalty doubled the advantage just before half-time.
Although the King Power Stadium hosts also dominated the second period, Jordan Rhodes' 70th- minute spot-kick meant for a nervy ending for the home crowd.
"I think if we'd won the game four or five-nil, I don't think anybody could have complained," Pearson added.
"But just to slightly redress that perspective, it's an illustration of how fine the lines are in this division and football in general.
"It's a tight game in the end scoreline-wise and I've seen games like that end up in draws or even narrow defeats.
"It's finding a way of getting over the line. Clearly scoring when you're on top is important, but I don't think anyone could argue that we weren't worth the three points tonight."
Frustrated Blackburn boss Gary Bowyer was fuming over Leicester's spot-kick, which was given by referee Simon Hooper for a foul by Tommy Spurr on Ritchie de Laet
"I think you always judge it by the reaction of both sets of players," Bowyer said.
"I think you could see what our lads thought of it. And I think if you look on the video again there's only one Leicester player that really appeals and even then it's half-hearted."
Bowyer believes that first spot-kick was the defining moment of the match.
He added: "I thought we didn't defend very well for the first goal and then we were just preparing to go in at half-time and just started to come into the game and got into one or two good areas against a very strong and experienced Championship side, and then the linesman gives a decision that changes the course of the game."