It might look easier to earn HZ by posting useless things on their own forum but you will soon find it hard even earning 100HZ out of that.
Actually, all HZ earned from forum postings is manually checked in order to prevent people from posting useless things. If a post is deleted then the HZ gets deleted too. Also, all withdrawals are processed manually in order to prevent people trying to game the system.
Check out
https://horizonplatform.io/get-started/earning-horizon/ for more info.
Yes, I supported your statement by placing 'might looks easier' mean anyone might think 'fool' system by placing lot's of content to earn HZ. But when they get 'real value' spendable on their wallet, they will find thinks are not easier to bang HZ system and earn money but have to do real job to earn money.
Mean to me it is still worth valuing every HZ we see in market for trade.
Keep the work and grow HZ network hugh, really.