Not in the slightest. When Agatha takes Wanda on a trip down memory lane in WandaVision Episode 8, she realizes that Wanda had magical abilities from the start. Wanda had always assumed it was luck that kept her and Pietro alive when they were trapped in the rubble next to a Stark bomb that never went off when they were kids.

Agatha explains that it wasn't luck that the bomb never went off. It was Wanda casting a probability hex without even realizing it.

Wanda's witchy mentor theorizes that Wanda's latent powers might've been snuffed out if she hadn't encountered the Mind Stone. Once again Wanda was being experimented on, but this time she had volunteered herself willingly. "We thought we were going to change the world," Wanda said sadly when Agatha questioned why she signed up to be a HYDRA experiment.

One day, HYDRA scientists led Wanda into a room with Loki's scepter, which housed the Mind Stone.

The Mind Stone revealed itself to Wanda, showing her a vision of the Scarlet Witch. Wanda didn't realize what the vision meant at the time, but the Mind Stone amplified her latent powers.

The Mind Stone also showed her what the future held, where Wanda was no longer a woman who just happened to have powers but rather the Scarlet Witch prophesied in the Darkhold. So Wanda had possessed powers since birth, but she had to accept her destiny in order to truly become the Scarlet Witch.