Honestly, I do not really "get" chia seeds as a necessary part of a diet. If you like them, great. But I think the most common way to eat them is as a pudding with a lot of added sweetener & fat so I'm not sure chia pudding is superior to other sorts of pudding or even something like overnight oats. To me, the texture & taste tends to be pretty similar to something like bircher meusli-- more like sweet, cold, poridge, than custard. Also, they are pretty calorie dense and I just do not have a need for calorie dense foods, especially as a transport vehicle for additional sugar & fat, as I am generally a pretty "easy keeper". For me, increasing my fiber via more veggies & a limited amount of legumes & whole grains is better bang for my buck.
I think there is a chia lobby that got a lot of instagram influencers on board which is driving the whole chia thing, personally. But maybe I'm crazy.