Good advice, but it does not apply to Finland or Sweden. Both of these nations have relatively strong Armed Forces and defense capabilities. Their addition to NATO bring strength in absolute terms.
One might argue that Finland's extensive border with Russia creates vulnerabilities but in the modern age of satellites and hypersonic missiles, geography is less critical than in the last century. Equally, the geography represented by Ukraine does not offer the same kind of buffer that failed to shield Stalin in 1941.
While Finland's geography presents a vulnerability, it also exposes a Russian flank that alters relative positions to NATO's advantage. Sweden, insulated by the Baltic and Finland, offers no geographical vulnerability and reasonably powerful Armed Forces.
These considerations are quite apart from an overall judgment whether or not we should be involved in NATO but it is fair to say that, on balance, the addition of Sweden and Finland strengthen NATO.
