@Mountaineer Encryption needs to be added to the standard, and then Apple will be expected to implement it. Hopefully the EU knocks some heads together and makes this happen.
WhatsApp is owned by Facebook and has ads, which is two good reasons not to use it. Europeans are just as "stuck with a bad standard" as Americans are here.
I use RCS quite a bit and like it. Although nothing on a phone should be regarded as truly secure.