If you're rated, lets just pick a number, 600 points higher than your opponent it's likely you can win simply with what you'll consider fundamental knoweldge. Develop my pieces, take the open file, win a knight with this tactic, and mate. So I can see how players make the statement "no style until 20, 22, 24, or 2600" (inevitably the stronger to commenter the higher their estimate). There was some Kasparov quote during his time at the top where he said only a handful of people in the world played "real" chess... the others were just copying from the good players (something like this) haha.
But yeah, I think everyone has a style when they play their peers even if you just learned the moves. Some people bring the queen out early and go for the kill right away. Some play a checkerboard pawn formation with hopes of building a fortress.
In speed games my style is all about the initiative with diminished care for material... but long games are opposite. I like slow grinds with careful transitions and winning in the endgame. Some master may laugh... I'm not saying I'm good at it, but that's how another player would probably describe me.
I heard somewhere that club players have no style.
OTOH, I read in an Andy Soltis book, that after learning the rules everyone begines to show preference of moves. For example, one beginner would play bishop long, because he prefers long oves. Another player might make knight jumps because he feels knight jumps are harder to calculate. This proves that there are styles and prefernces at every level.
What is your style and what moves do you prefer.
Also, I believe that playing a wide variety of openings can help in diversifying.