Indeed. And that's why it's good to see the more primary royals associate and form personal friendships. I.e. the present younger monarchs and CP-couples in particular.
A by-product of these relationships is that their children will eventually meet and perhaps form bonds as well from an early age. - And who knows, the next royal-royal marriage may be founded within the next ten years. (*)
As Amaryllus pointed out, their positions are unique and their club very exclusive and it is no secret that they exchange ideas and benefit from each others experiences. Especially, I can imagine, the commoner spouses.
It is certainly a beneficial network that it would be a shame, perhaps even unwise, to opt out of.
(*) Let me see.
With 4 Danish children.
So far 1 Swedish child.
2 Spanish girls.
3 Dutch daughters.
3 Norwegian.
4 from Belgium.
(And these are just the children of the primary royals).
There is a reasonable chance that two of them will fall in love within the next ten-fifteen years or so.
I've omitted the Monaco family and the Luxemburg family, because I'm not certain they interact that much with the other royal families.
If I'm wrong that only widens the field.
I also left out the Greek royals, because chances are that Greece will remain a republic, so they are destined to become commoners within a generation or two.
And finally I left out the British children. Because unless W&K join the current younger royal network, George and Charlotte will only have limited interaction with the other royal children, while they are still children.