That's because they weren't the bulk of the population. The estimates on how many indentured servants there were vary wildly but, by all accounts, they were not the bulk of the population. I can't find any source that says the bulk of the colonial population were indentured servants, so it can't just be revisionist history here.
To be clear, there were at least tens of thousands of indentured servants, and indentured servitude is *bad*. Not to mention the entire slave trade in the south which I won't even bring up in this conversation because comparing the horrors of slavery to indentured servitude would be abhorrent.