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So, to summarize - Yes, there are winning players who don't use PT. However, as a caveat, these people tend to already be very good poker players and very adept and hand reading / player reading (thus playing as if they had their opponents stats available). If you are like most of us, PT is a great asset to helping your play.
Another thing about PT that helps experienced players (those that win significant amounts of money) is keeping track of wins and losses for taxation purposes. In the US you are expected to pay income taxes on your poker winnings if it exceeds the income tax minimum.
Edit: OP
did mentioned where he was from after all.