It's an abrasive phrasing of a legitimate and, if you zoom out, apparently sincere question. "Toxic" is an overstatement.
"Never heard of Pando, wondering if anyone could give brief insight into why it's significant?"
Including the abrasive phrasing when it is not needed is toxic and not helpful for polite discourse.
Ed: if you had led off with
> The sentence works without asking "why I should care?"
then no one would be quibbling with you.