The issue isn't that you can't make alternate prompts that people can use, it's that the OP and actual prompts aren't as good as the ones in Seto's thread. If you want people to take your thread seriously, you have to put more effort into your prompts and OP so they can compete with Seto's thread. Nobody is going to participate in an objectively inferior product when a superior product is always present. Do something unique so your thread stands out, like video writing prompts or more than 3 prompts.
And above all else, fix your grammar and spelling mistakes. Here's a revised version of your sentence:
'Hey, anyone can make prompts, it's not that only a few people can.'
Always capitalize the first letter of the first word in a sentence, and put spaces after commas and punctuation marks.