Benedict has been Dr. Strange as long as Gal has been Wonder Woman. They both debuted in 2016 or did you forget that? They've both only had two solo films and a smattering of guest appearances. In fact, Cumberbatch has been in more MCU films than Gal has been in DCEU films. So, if you're saying that Benedict should stay cuz he "hasn't been around that long" but are telling Gal she better hurry up and move on, that doesn't seem logically consistent.
Plus, look at Hemsworth. Dude has been Thor for 11 years and seems to want to keep it that way for another 6 at least.
Also, you really seem to be cherrypicking from that quote from an article that came out in 2017. Even in the part you cite, she says "as long as the story is good" she's game. Plus, nobody is expecting her to be Wonder Woman when she's like 60. Of course it's not gonna be the only role she plays her whole career and she will eventually move on to other projects. However, for a good while, she seems geared to be Wonder Woman. And she still gets to do other projects while she's playing Wonder Woman.
I mean, Hemsworth got 4 Thor films. Let Gadot get her 4 Wonder Woman films. She obviously loves playing the character.
And if the end goal for you is "hurry up and finish so we can restart the DCEU," well again, that's likely not gonna happen. They've seemingly signaled that they want to continue with this same continuity and rumors are that they are actively seeking to bring Cavill back to be Superman. And sorry, but Reeves's The Batman is also not gonna be a starting point for a new DC film universe. Reeves himself only signed on because he didn't want his Batman being in a shared universe. So, it looks like Gadot is set to be Wonder Woman for at least several more years.