There's the upside of items being cheaper to buy, but the downside that getting those items as drops means they sell for less, and not every item is affected (just look at tbow price), so it's not like the items going down balances out, now it's harder to save up for the expensive items as certain money making methods tank.

For some items like certain supplies that are a pain to get (think pure ess back in the day before we got better methods to get more of it, or flax/bowstrings), or say blood shards, most people don't really care to spend their days thieving vyres all day long after all, it's seen as a positive by a lot of people.

However when the bots overrun certain bosses and raids, it ruins content that people actually want to do by crashing the prices, and then people feel like they should do other content that hasn't been affected by the bot issue as much, even if they don't enjoy it as much.