Earlier quoted context omitted.
No it isn’t. https://en.wikipedia.org/wiki/Income_share_agreement > An income share agreement (or ISA) is a financial structure in which an individual or organization provides something of value (often a fixed amount of money) to a recipient who, in exchange, agrees to pay back a percentage of their income for a fixed number of years. ... > Common Concerns Indentured Servitude > However, advocates of ISAs contend tha…
If it's not dischargeable in bankruptcy, it's indentured. The relevant question is "what is it acceptable to own?", and if your answer includes "human capital" your answer includes "people" and that makes you pro-slavery.
In that case student debt is indenture and ISAs aren’t.