I think I’ll comment here having had conversations with my now late aunt. A bit of different context but I think has parallels.
My grandfather had Irish, Catholic parents. He was a clever man who had to leave school at 14 and joined the Civil Service in 1915. However, strike 1) he was Australian born. Strike 2) He was Catholic. Strike 3) he was of Irish parents (free settlers but even so). Consequently, he was never able to progress beyond a certain grade because 1) he wasn’t English born and certainly not English educated. 2) he didn’t complete high school and 3) he was Catholic. I can see from the Civil Service staff list that all those in higher levels were WASP’s.
Convicts and their descendents were in the same boat. Their opportunities for a respectable career advancement would have been next door to nil due to caste. Many convict descendents did very well but usually because they started their own business. They also mixed in their own circles as they had little entree to the caste that included senior government officials, university academics, bankers, and the squattocracy. Not disclosing convict ancestry would have made a path life easier if you had any sort of upwardly mobile ambition and any hope of a respectable reputation.
Even in my own little backwater, I read local biographies and it’s the English, Protestant free settlers who are allocated large tracts of land, socialise and marry amongst themselves - convicts, ticket of leave, Irish settlers and the bride ship girls all had to create their own society.
See also My Place by Sally Morgan “yes, we are Aboriginal but if anyone asks, your grandparents are from India”.