Yeah, "just build nukes".
If it was that simple, every one would have them. And even then its probably the worst choice they could make at the moment..
More like the best choice. If you don't want to be invaded, you need nukes. Any country that had nukes and gets rid of them is just asking to be invaded. Libya got rid of their nukes, got invaded, collapsed. Ukraine got rid of their nukes, got invaded, got abandoned by the US. Canada got rid of their nukes, Trump is talking about annexing the country. I guarantee Trump would be a lot more polite to the Canadians if they had something they could point right at Mar A Lago and go "Invade us at your fucking peril".