White players who were also not ready for international cricket were also put into the team but never got the same amount of scrutiny.
AB took a couple of years to get to legendary level. He was not totally convincing in the first few years of his career but the selectors persisted with him because they knew what he was capable of. Kallis was also apparently poor in his first few games. We all know how poor Amla was when he first came into the team but apparently Kallis was as poor at the start.
Even Elgar was very poor at the start and was not dropped.
You are absolutely correct. In fact if I remember correctly Kallis was even dropped as a result of his poor start. Their selection WAS criticised just not on racial grounds. The existence of quotas / AA however leads to the temptation to criticise on racial grounds as in "ah he/she has been selected as a quota player"
In this sense at least the quotas are counter productive as they introduce grounds for racial stress instead of removing them.
It is interesting to note that in at least one instance the beneficiary (so to speak) of an AA / quota decision was mortified by it. I refer of course to the replacement (11th hour) of an on form (red hot) kyle abbott by Vernon Philander in the 2015 world cup semi final (that we lost) Philander's selection was irrational as he had just been declared fit to play after an injury whereas Abbot had shone in his absence.
The actual merits of the decision seven years later are less interesting / important than the fact that Philander himself was upset at having been inserted last minute as he felt that it would imply that he was a quota player which he certainly was not.
The point is this. As long as quotas exist incumbents of positions will always know that there are those that believe they are there only because of their race.
No matter who one selects / appoints there will always be those who disagree and believe someone else to be more worthy, why hand them, on a platter, an excuse to make it about race, or any other reason other than merit?