A bot doesn't add to community. A bot doesn't spend wrecklessly buying cards because they like the art or want to impress their friends or just really need to add that last beta card to their collection. A bot doesn't do anything that isn't a calculated and duplicatable move to take more value from the system than it adds to it. The second a bot has to pay more in than they receive they are gone. But by that point, players are gone too because a bot farm that's already bought all the spellbooks will farm fractions of what a person would stick around for. Their precision and ability to duplicate their efforts means they will accept a profit margin per account that would make a person give up since the person needs to put their time and effort in where as a bot doesn't.
Bots also aren't satisfying to play against for many people. They also take assets straight from mint to market. And their efforts get duplicated tens of thousands of times. The driving down of the price of cards due to the sheer amount of cards in the game which are only here because of bot farms. The gold rare cards that used to have a $20 floor are now less than $10 because the 2000CP they provide is no longer valuable. You can buy maxed out venari heatsmiths with 2100 CP for $5. Why? Because we needed enough rewards cards to keep the bot farms in business so now we are drowning in CP.
More and more this game doesn't actually reward people buying assets. They reward selling them and that's exactly what the bots do. They mint assets and sell them. Printing more cards, more dec, more chests, does not equal more rewards. Rewards need stable value in order to be rewarding. Example, a few months back I got a gold foil lava launcher in my rewards. It was a $100 card. Sweet! Now it's a $9 card because we printed more and more and more. And are the bot accounts buying those cards to keep the price up? No, they are farming them by the thousands and selling them. Undercutting each other and willing to accept a slimmer margin than the next guy because anything is enough profit when you're set it and forget it bot farm. And each time they drive prices down lower, more players get discouraged that those rewards they got aren't so rewarding. That no matter how much they add to their account or buy, the value just keeps dropping anyway. But again, bot owners don't care. This is only about the profit. And a $2 gold foil Epic card is still $2 in their pocket. They don't use those cards anyway. They use basic level 1 CL cards.
And making bots rent those level 1 CL cards doesn't add much to the economy and they wouldn't do it if it did because again, bots are here to take more than they put in, full stop. How abundant are CL common and rare cards? Most of them rent for .1 dec which is now $0.0001 per day. If they have to rent 50 cards to not have to use starter cards (probably only need about 15) its half a cent per day to now get back soooooo much more than they got before for not paying in that half a cent. How is that helping the economy? THey will take those cards and that dec straight to the market and undercut the already low prices and there aren't enough human buyers to keep up with them so market caps will just keep pushing lower.
Finally, the more people who have bots playing in their place, the less people actually care about the assets they're winning beyond the sell price. And the less people care, the lower that sell price goes until they aren't worth anything.
Bots aren't the same as people.