We should think of the ENSO phenomena as being a small part of a bigger climate picture.  Not a "causal aspect" - ENSO is part of the normal functioning of planet Earth's atmospheric ecosystem, like tide cycles.

The variable that coincides most with change is the atmospheric increase of greenhouse gases, a finding scientists have known about for well over 150 (possibly 200?) years, and something that's been discussed in popular culture for 50 odd years at least!  Coverage seemed to wane a bit after the 1990s, but of course "everything old is new again".  I digress:

In the data, we can see a correlation suggesting hot El Niño phases tend to coincide with the upper direction of global temps, while cool La Niña phases coincide with where we can presume the "new normal" temps settle out.

This is the "patently obvious" that needs to be discussed, so that proper mitigation measures can be taken.  The trend in data is indisputably upward, ENSO or not.  Meanwhile 'extreme weather events' will likely continue 'surprising' the public, insurance co's and governance functions, more and more, until then.