I’m prepared to accept Irish government public health advice and recommendations on this rather than something on a message board.
Why not spend some time doing research, and come back and tell us if you stand by this claim.
The evidence is quite clear, as
@Watershed states, that many (if not all) of the common mutations that lead to new variants of “concern” arising.
For example, the E484K mutation is present in B.1.1.7 (originating in the UK), B.1.351 (originating in South Africa), and P.1 (originating in Brazil) - this demonstrates that the evolution of the virus is taking a similar course regardless of its location.
I know it seems the obvious, right thing to do to trust the government, but do some research and you will see that what they say isn’t always strictly the case (in many cases, it’s miles off).