I can’t say I’ve spoken directly to a dev in a situation like that, thankfully, but if that opinion were dominant, FOSS wouldn’t be a thing. Destroying your data or OS is kind of a no-no, whether you pay for the software or not. Obviously, you can’t sue the FOSS dev, but come on, it’d be amazingly shitty if they didn’t even try to help if there’s any evidence it’s their fault.