In control no, but it's not like someone who's just gonna sink their own islands would be able to become Yonko. Remember that this happens to Big Mom constantly, if her rampages drove her to the point of destroying her own island, would she have ever become a Yonko?
Bear in mind that that it's not like Big Mom's rampage was going on for days and days or whatever. Even Whitebeard's strongest Quakes couldn't destroy the main building in Marineford completely, but you expect Big Mom to destroy her entire island via wanton destruction during a short period of time? Not to mention that Big Mom was also traveling along a general path, not just running around the entire island just destroying this, and doing most of the destruction by eating things, not just straight breaking them. Take a look at the state of Marineford after hours of WAR and then tell me what Big Mom did alone was underwhelming.
Don't try adding logic to this. Its an intro, I could care less what the hell would be possible or not. Oda makes it happen. He could have made her destroy another island, not her own if he wanted, it would be written differently. There are unlimited scenarios Oda could have used to introduce her lmao its not rocket science.
Lmfao at you comparing WB's attacks to this street level damage, that pre timeskip Sanji is capable of. Some rampage.
Show me Kaido and Shanks doing more damage.
Lmfaoo did Kaido or Shanks go on a rampage? Did they even try destroying things? What a stupid comparison, you want to know what Shanks did in his Yonkou introduction?
He knocked out people left and right without even touching them, something that was unheard of in One Piece during the time. He put dents on WB's ship just by his presence alone, he split the damn heavens. That is how you build up hype.
What did Kaido do? He fell from 10 000 meters in the air, and didn't even receive a scratch, he recieved a huge narrative to his intro. That is how you build hype.
Big Mom doing street level damage when on a rampage is not saying shit. Jack's 1 billion bounty intro was more impactful.
These intros have to do one thing, they have to be impactful, something that would make you feel "yea this pirate is not like any other we have ever seen, someone special, on a whole other level" and Big Mom failed on a heavy level.