I will keep this short and simple--and this post is to open our trading understanding a little.
As the title reads, oh yes, it's true, but they still lose.

They are busy chasing a better strategy that can only exist in their imaginations, thereby losing focus, and then style drifting.
Those simple strategies you undermine are enough for you if you work on yourself. I was shocked when I realised someone bought a trading strategy for $3,700...oh my God!

And guess what, it failed him, what a waste!
A good trading strategy is important, but what traders need to succeed is not an absolute strategy that gives 100% winning or close. A 60% winning strategy is okay if you can work on your
trading psychology and
money/risk management. As simple as the two are, they've reshaped my trading results for good.
Reshuffle that mindset and see the result in months.
The outcome of every trade has more to do with our very self and very little to do with whatever type of strategy we apply to the trade, mindset is very important and plays a very strong role in determine what type of result we achieve in every of our activities.
Some or would I say most people hate to start small, the hate the process of learning and becoming perfect in something, they hate the stress, the time which they would rather choose to spend on things are doees not have long term profit, the determination and perseverance that goes with learning and getting perfect in something, most of us are like babies born today and wants to crawl, stand, walk and even run on the same day they were born, this is usually one of the reasons why many find success hard to achieve in most things that they do.
So I very much agree with you, becoming a good and profitable trader takes time and it involves building one's mindset, those who lack the patience and zeal to wait and build often times end up wasting money.