Sure we do. We’ve all recently been labelled “not match fit” by our ex-Overlord. How much more evidence do you need?
As described upthread, there’s a lot of differing chemical ingredients that can make some not fit for flying depending on the makeup and usage of each battery. The average consumer would have no idea about the suitability. Given the risk posed, I can understand the Airlines’ caution as the consequences of even just a small battery fire/explosion could be devastating in the worst case scenario. The flow on effect to overall travel similarly harmful. In fact, one could argue for battery checks and bans to be extended to trains and other forms of travel. Let’s hope this doesn’t snowball.
Crystal balling a whacky idea for a second and some food for thought... I wonder if the airlines (led by the Yanks of course, cos #World Leaders and We’re No. 1 etc) will eventually be forced to introduce appropriate Airplane-safe battery standards with the support of the Chinese manufacturers. Airport security screening might then be able to verify eligibility, somehow? Batteries that don’t meet the new safety standards would not be eligible to fly. Given the impracticalities of retaining your newly labelled ineligible-to-fly batteries at the security screening points, most would reluctantly be abandoned at the airport. This could be similar to the great nail clippers fiasco post 9/11 which empowered the TSA to a frightening level of undeserved entitlement. But this time around the Airports make a killing reselling all the battery packs on eBay and the retail outlets post-security would smirk on every RRP battery sale