I am not sure how India and Brazil benefit from it
india also just doesn't like the UK for colonial reasons. they don't take kindly to being 'told' what to do by the west, which is 110% what is going to happen if they join any kind of economic or defense alliance.
"let's all hate china together and be BFFs" sounds great, possibly even the obviously correct, moral and upstanding thing to do if you're a white westerner, for everyone else in sk, india, brazil... it doesn't really work. there's that pesky colonialism/imperialism historical thing always getting in the way.
India wouldn't sever its ties with China and Russia overnight, but it would help to erode their despotic influence against the rest of the world.
It will be interesting to see how that works out if tensions between increase further between India and China, who Russia are now also closely allied.
Interesting times all round.
China was never a part of the G-7, and Russia wasn’t a separate country (and the USSR wasn’t a member) when it was founded as the G-5 or expanded to the G-7; it was admitted after 1994 first as a “+1” non-member, and then as #8 when it became the G-8, before they were expelled in the wake of the invasion of Crimea.
Not only is your explanation wrong, the facts you explain with it are also wildly wrong.
Countries like India and China are still pretty poor on a per capita basis and don't really interact with the international banking, force projection, or trading systems in the way the G6/7 members did and do. G7 members all have per capita gdp in the same neighborhood which gives you an idea of their ability to respond collectively to events (whether they do so well is another matter).
Russia was always an anomaly; adding them to the group was more an aspirational goal than a practical one, so it's no wonder that fell apart.
SK makes a lot of sense and doesn't even need the justification ("should have another asian member"), though its per capita is far behind the others. Compare that to Australia (also a Quad member) which has a higher per capita gdp than most G7 members and an economy around the same size as SK's -- it's not really big enough on those other topics to be worth adding to the Gn).