Unfortunately if the plaintiff wins, insurance will become even more expensive and all pilots will bear the cost. If the NTSB and FAA did their jobs, there would be other mechanisms to address issues such as this CFI. I could think of several such review boards, tip lines, etc. Law suits should be be the last resort.
Regarding thunderstorms. We all know not to flying into thunderstorms. There is a hidden menace that we cannot see. Building columns of rapidly rising air. Often there is no indication of this rising column of air. I know of four aircraft ripped apart by flying through these rapidly rising columns of air. We can see it now due to NEXRAD and ADSB. I’m not saying this happened in this case but trying to bring awareness of this unseen threat.