Gsp didnt know how to punch. He learned The jab to secure rounds. Canadian goat for sure
Didn't know how to punch? LMAO
The first TMA he learned was
Kyokushin Karate*, and then he learned grappling, in the case of jiujitsu only by going all the way to the Gracie's gym in New York to train.
Give this a watch.
Now listen up.
To develop the power to knock someone out--leaving aside the proverbial "one you didn't see coming"--you have to plant your feet and commit. That leaves you wide open to counter-attack and hampered in the ability to defend. GSP was not all that different from the Diaz bros in that he preferred instead to repeatedly and aggressively damage his opponents while not expending much energy compared to head hunting--hence the appearance of incredible cardio though it had a lot to do with great technique--and while remaining more able to defend and so he took relatively little damage.
So, whether or not GSP had knockout power per se, it was never really his style from the beginning; rather he went for voluminous, heavy blows, which, as often as not, set up submissions when they didn't result in TKO's. In his first 7 fights, he won 3 by TKO due to strikes, 2 by submission, 1 was stopped due to a cut, and he had one decision. From the very start he brought such a wide array of tools to the game he never needed to rely on a risky fully committed strike that could leave him wide open to getting knocked out himself--until he lost his head prior to the first Serra fight, that is.
HTH
*Kyokushin, an extremely hard style, involves breaking more often than the other styles and
full contact, knockdown sparring as a main part of its training.
More interesting background.
Here's some actual proof of what I am telling you:
https://www.thecanadianencyclopedia.ca/en/article/georges-st-pierre
"St-Pierre was introduced to
karate by his father at the age of seven.[snip]
At the age of 12, St-Pierre received his 2nd dan (degree) Kyokushin karate black belt. He continued to train in karate until his teacher, Jean Couture, died of lung
cancer when Georges was 16 years old. Around that time, St-Pierre saw a video of Brazilian Royce Gracie fighting in UFC 1 in 1993 and got hooked on the sport. After that, he began training in
wrestling, Brazilian
jiu-jitsu,
boxing and muay Thai, in addition to karate.
[snip]
St-Pierre made his professional debut in UCC 7 on 25 January 2002, fighting Ivan Menjivar of El Savador at the Verdun Auditorium in
Montreal,
Quebec.
He won with a knockout late in the first round."