They're fine, it's not different than a lot of the garbage breakables in D2 and other games. Sure, you might luck out and get an exalt out of one out of every 3 million you break, but like, it generally doesn't matter much. The time needed to intentionally break all those open isn't worth it, so if you're not passively cleaving them down with your AoE then /whatever
Only places I actually bother are specific maps like Distant Memories and safehouses and whatnot as they seem to have a slightly better chance of dropping something (and there aren't that many so it doesn't eat up much time).
Though the actual chests...I always open those, even if they're just white. Why not, it's a bunch of free dudes to kill /shrugs
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https://www.reddit.com/r/pathofexile...s_game_is_too/
Given the recent discussions, felt this is a pretty topical thread. Note the extensive confusion for a new player on everything including a lot of the very basic concepts.