That’s one way to frame it, but it’s missing the power imbalance. Loveable was the smaller party here, Figma suddenly turned hostile when their success overlapped with a feature Figma hadn’t monetized yet.
“Used the moment” sounds a lot like surviving a punch and then asking for help. If you think that’s scheming, maybe revisit who threw the first punch.
I think the point the parent comment is making is that companies shouldn't be able to trademark common phrases with their usual spelling. 'Dev mode' is a common short form for 'developer mode' which has extensive use.