It was more relevant at the time, I guess? No one's doing opinion polls on whenever people would like to join Russia or stay in Ukraine in the middle of the war if you don't count fake referendums. And if we're not talking about "LPR/DPR", the rest of the Ukrainian Donbas is understandably extremely anti-Russian now (and no one knows what's really happening in LPR/DPR in terms of their genuine political opinions).
I do wonder what Crimeans think about it now for example and how much their minds are getting poisoned with propaganda. I do remember that different independent reports suggested that people in Crimea weren't too happy with how everything played out eventually – I'm talking before the 24th of February – since a lot of those who wanted to join Russia were basically thinking that the grass was greener on the other side. And once they became part of the system they realized that it wasn't.