If Finland joins, Sweden will follow. We can't be the only baltic nation outside NATO. That would be both foolish and selfish. With the third largest party, SD, switching there is a majority in Riksdagen pro-NATO. S will follow soon.
And it’s extremely selfish by the self proclaimed humanitarian super power to not step in and help if some of our Baltic neighbors were attacked.
The cost of a strong enough military outside NATO is higher than inside. 4-5% of GDP vs 2%.
Not to mention to secure against a Russian invasion of the mainland, of course…