Australia and India are two of the richest board and they do not need to play a lot of international matches to generate revenue. The virus strain was still present when these two countries were playing matches. Since it was a home series Australia did not have any issue at that time, and the Indian board wanted to cash in. That is why they played and now they only using the virus as an excuse.
I can't agree with this. Australia is having very low rates of COVID 19 infection, and BCCI assessed the situation and found that the risk in touring that country was minimal. On the other hand, South Africa is one of the countries which is hit hard by the pandemic, and they have around 10,000 new cases per day (for Australia, the daily average number of new cases stand between 5 and 10). You can't even compare the situation in both the countries, as the infection rate in South Africa is almost a thousand times higher.
I have seen tweets by Pieterson and Vaughan. Either they are misinformed, or they just want to use this as an excuse for their anti-India tirade. They are essentially trying to drag in the BCCI, in an issue between the CA and the CSA.