There are fortunately quite a few of us geeks around.
Yes, this visit, as well as that with Daniel and Victoria can basically be boiled down to a show of solidarity with the Baltic countries. You are not and will not be forgotten - or left to fend for yourselves...
Estonia and to a considerable extent Latvia as well fall under the Nordic sphere of "political solidarity", for historic and cultural reasons. While Lithuania in particular falls under the Polish Czech sphere of "political solidarity".
Frequent visits by high and higher ranking representatives of these countries are "plausible natural activity between neighboring countries", while frequent visits from countries like say Germany, Britain, France, USA might be considered a little provocative... Keep in mind that the Baltic countries have considerable minorities to consider.
The Baltic countries and the Turkish-Russian border are the two areas where an armed skirmish (i.e. shots fired, including warning shots) between NATO and Russia are most likely to happen at present.
Syria does not count unless there is a deliberate strike on either a Russian base there, or a base with western special forces. And both parts, in particular Russia (who has won that war) have no interest in doing that. Even though some vocal hardliners (especially in the US Senate) would like to see a confrontation happen there. A show of force so to speak.
That some "advisors" are killed by Russian or Western bombs is quietly swept under the carpet. Just as in the good old days, during the Cold War.
So muuuuch better to send the Nordic politicians and royals visiting en mass... They'll eventually wear the red carpets thin...