The problem is that Gladwell comes off as trying to be scientific, when really he's just a persuasive storyteller. If you view Gladwell as a purveyor of facts or a science communicator, then he does a horrible job and yes, it's hard to trust whatever he presents because he's at best not very careful about his facts and conclusions. In that case, why would you ever pay attention to him?

On the other hand if you see Gladwell for what I think he is, which is an entertaining storyteller using science as a backdrop to present his view of the world, and willing to twist it to suit his view, then he's really no different than many other writers. In that case you can enjoy him or not, at your leisure, just as you would any other editorial or op-ed piece. Entertainment is entertainment, and his content is entertaining even if I don't expect it to be true (to be clear, I'm approaching this as someone that mostly consumes his podcasts, which some chapters of his books have been directly converted to. I wouldn't want to spend the time reading this content that's not true, but I'm happy to listen to it while on a drive).

Whether he's causing more harm than good overall to the public is another question, but honestly that's a much bigger discussion with a lot of much bigger problems than him, so I'm not sure it's worth getting worked up over.