It's helpful to remember that there is effectively no free/independent press in Russia (certainly not at these official meetings). Nobody snaps an embarrassing photo or takes a compromising video - all media is curated, censored, and crafted for release. If you're seeing it, it's because Kremlin wanted you to see it.
What's the message from that photo? That if Putin starts feeling unwell after the conference it wasn't due to one of those guys at the other end of the table?
In that photo, the message is "There is only one ruler". Putin represents the stern father figure, and in the moment of crisis, he does not debate, discuss, plead, or succumbs to the influence of the lesser court dwellers or foreigners.
Another example is this video of Putin's "heated exchange" with his chief spy [1]. The point of releasing that clip is to demonstrate that "The weak, meek, and confused oppose the ongoing liberation on independent nations". Viewers would not see themselves reflected in the speaker, and that distances them from his ideas. Yet there is a strong protagonist in that clip.
