No, some cheaters have a device that plays the best move in 1 second. But I'm sure there are wayyy more good players than cheaters, so don't be scared to play a specific time control.
Cheater! Where they are?

The perception of cheating levels is orders of magnitude more than the actual amount. The vast majority of games and players are clean.
https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
https://www.chess.com/article/view/online-chess-cheating
https://www.chess.com/article/view/chesscom-update-april-2025#FairPlay
The site closed more than 107,000 accounts in March for fair play violations and has a full team of staff working on reports along with some automated systems for detection.
https://www.chess.com/article/view/fair-play
That said, discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums.
https://www.chess.com/club/cheating-forum
I often see banned accounts, on average they are active playing rapid for 10 minutes. So is the 3+0 game or bullet 1+0 safe from cheater?..