"I think you've got to give the freedom and that creates the creativity," he said (via Autosport).
"Mandated pitstops? It will have effects on the end of qualifying and how many laps you do in qualifying to save tyres for the race... so that to me, it doesn't make sense.
"You want to run your fastest race and whether it's a one stop or two stop or three stop. That's where we need to be at."
A predictable outcome
"From a safety point of view, I fully understand why they did it," Horner added.
"Maybe strategically, it wasn't the optimum strategy for this race, two stop and tyre deg and some of the other things would have come into play.
"But it was a different race and it tested the strategists in a different way.
"The thing is, it made it a lot more predictable because you know what the maximum stint length for each car was.
"So for us, it was about managing the risk and exposure of a safety car within the last 10 laps, which is why we went past an optimal strategy to make sure that we had the coverage in the event the drivers behind had a free stop to give Max the best tyres possible.
"So, it was a risk limitation strategy, particularly in that last 10 [laps]."
GPFans is a multi-platform, multi-language brand dedicated to Formula One coverage. We bring you all the ins and outs of the sport, 24/7, everything from up-to-the-minute news and features to the latest viral stories and clips.
We believe that a new generation of exciting, outspoken drivers will make F1 more popular than ever before, and we want to give our users access to as much of their heroes as possible, on and off the track. From Lewis Hamilton to Max Verstappen, Daniel Ricciardo to Sebastian Vettel, we provide in-depth analysis of every every Grand Prix in the season, from Australia to Abu Dhabi.
With Formula One under the new ownership of Liberty Media, how the sport is being covered is evolving, and GPFans will look to be at the heart of this progression into new media, as one of the fastest-growing sites covering the king of motorsports.