Many tankers just wanted/want to see the young guys plays hella minutes. That is literally it.
Welp, your definition of tanking is never the one I've used for decades. To me it was putting out uncompetitive garbage players on the court in order to rack up losses and to thus gain a higher pick in the upcoming draft. Not to just go with a youth movement and see where the chips might fall.
Personally I think my definition is what people think about when they think about tanking, but who knows.