Earning On Steemit Is Hard Because:

You Need To Have A Lot Of STEEM Power, Which Is The Amount Of Influence You Have On The Platform. The More STEEM Power You Have, The More Rewards You Can Get From Posting, Commenting And Voting. However, STEEM Power Is Not Easy To Acquire. You Can Either Buy It With Real Money, Earn It By Posting And Curating Content, Or Rent It From Other Users.
You Need To Create High-quality And Original Content That Attracts A Lot Of Upvotes From Other Users. This Requires Time, Effort And Creativity. You Also Need To Find A Niche That Suits Your Interests And Skills, And Stick To It. If You Switch Topics Randomly, You May Lose Your Followers And Credibility.
You Need To Be Active And Engaged With The Community. You Have To Comment On Other People’s Posts, Reply To Comments On Your Own Posts, And Upvote Content That You Like. This Way, You Can Build Relationships With Other Users, Gain More Followers And Exposure, And Earn Curation Rewards.
These Are Some Of The Main Challenges That Steemit Users Face When Trying To Earn On The Platform. However, There Are Also Some Benefits And Opportunities That Steemit Offers, Such As:

You Can Earn Cryptocurrencies That Have Real Value And Can Be Exchanged For Other Currencies Or Goods. Steemit Rewards Users With STEEM And Steem Backed Dollars (SBD), Which Are Both Tradeable On Various Exchanges3.
You Can Be Part Of A Decentralized And Censorship-resistant Social Network That Is Powered By The Steem Blockchain. Unlike Other Platforms That Are Controlled By Corporations Or Governments, Steemit Allows Users To Have Full Ownership And Control Over Their Content And Data.
You Can Access And Use Other DApps That Are Built On The Steem Blockchain, Such As DTube (a YouTube Clone), Zappl (a Twitter Clone), And DMania ). These DApps Also Reward Users With STEEM And SBD For Posting And Curating Content3.
I Hope This Helps You Understand Why It’s Hard To Earn On Steemit And What Are Some Of The Pros And Cons Of Using The Platform.