This is why you can't find a technical co-founder

There might be more reasons...

E.g. "I have an idea! You build everything and I will give you a 5%." Sure...

An idea is worth nothing if you can't prove it and you can't build it.

I'm technical and I'll say this: technical people who don't understand or appreciate the value of a non-technical partner or the amount of non-technical work it takes to build something of value isn't a partner that you want. Might as well just offer them contract work.

I started working with my current partner just because it was fun doing stuff together. When our first big client came around it was clear immediately he was great at managing people. Then I realized we're only partners, because he also managed me. I'm difficult :D

Most "idea" people I turn away, because I've got ideas myself. What makes yours special? Show how close you are to success. Get me exited. Prove your worth and I'll bring mine to the table. Or rather, show me that we match. Ideas are not worth much to me and if that's all you're concentrating on.. well, then I see no value in any of what you're saying.

Here is an old Dilbert cartoon on the subject. https://dilbert.com/strip/2015-09-11

Unfortunately, this is what I come across all the time. The last one was the best.
Here's my million-dollar idea. I am going to GIVE you the opportunity to develop this whole thing out. Once we start earning money, I am going to give you a salary and become the first employee, how awesome is that?

There are tons of things you could do as non-technical founder before even speaking to a technical person. You could have talked to a dozen of people in and outside your network to validate the idea, so it has more flesh to it. Be careful to document everything, even record calls (with zoom or similar) for example. If you show THIS to a technical co-founder, he or she will be impressed that you put in the time already. If you just come up with an idea and you still work full-time for a well paid job, there is almost no authenticity in your request.

Best is if you have actually worked on the idea a few months beforehand. Cobbled together a website with a website builder, you setup a domain and are collecting email addresses. Once you got the co-founder on board, keep working. Write articles, cold call or cold email people and keep talking to potential customers. There is so much work you could do.

I like to reframe it like this:
Find cofounders who share who you're helping. Not just a great idea. because most ppl who run businesses know... it takes a few tries. A few iterations.. or thousands... to figure out what the build. As long as you know who you're building a solution for.. you'll get along.

This post seems to assume that people bringing ideas are only offering small amounts of equity, in general. Is that what others are seeing? I'm coming with an idea and offering to do the continued user research and business development and equally share equity with my other cofounders. I would not have thought to try and keep 95% of the equity...

Still having trouble solidifying a partnership. Perhaps I've got different problems with my offer?

I just wrote something like that on a blog post that's going live tomorrow. Something that I notice by a lot of non-technical co-founders when they approach me, is as you said, they often don't tell me what they do. They don't say "You are a coder, I'm awesome at marketing or sales.", they say "You are a coder, I have an idea". We all need to bring something.

But he was offering more than an idea ....

Hidden in comments of the OP (of the guy you quoted):

I have pre validated it with sign ups ready to use the product on launch and I have a good amount of content marketing and social followers who I can push the product out to.

So why didn't it work out?

Comment by @hshidara is an interesting view. Maybe technical founders often mistake the challenge.

Hahaha that brutally true..