talkin you said IGCSEs were designed for DC whose second language is English 'FACT'.
That's incorrect actually. There are two IGCSEs in English. The ones taken in the UK are for those pupils for whom English is their first language.
You said IGCSEs were easier 'FACT'.
That's incorrect. The syllabus in some subjects is actually more challenging, particularly science and MFL. The grade boundaries are higher for an A*.
You said independent schools chose them to game the system 'FACT'.
That's incorrect. Many independent schools choose them because they believe they are better preparation for A level, that the linear system is more rigorous, and they do not wish to have the governement interfering with boundaries etc. The fact that it is easier to get a C may well entice your DC's state school towards the IGCSE, but it is certainly of no interest to Win Col, Eton, Wesminster, St Pauls, SPAGS, Habs, NLCS...or are you saying these schools are scrabbling around for C grades?
The reality is you know almost nothing about IGCSEs but fall upon anything that puts them in a bad light, without actually doing any research of your own to see if said information is true.
You just make yourself look uninformed at best, absurd at worst.