I have quite a few thoughts on the topic but will try to keep it rather brief. I've been in several of these groups and amongst my network probably know someoen who has been in 90% of the real estate masterminds that exist.
I think they definitely serve a purpose and I joined Ryan Dossey's group about two years ago and its the best money I could have spent. I was in a situation where I had done a few offmarket deals but wanted to figure out how to go direct to seller because those were the most desirable deals. I joined that group because I needed an example of people who were buying off market deals and weren't sleazy and actually cared about people. Before I joined that mastermind I had done 3 deals my first year, to the year i joined to 40+ this year, and the spreads on those have consistently gotten larger as well. But even more than that I've made great friends in the group and have an awesome community there.
That being said, I've done other masterminds where I'm not fully bought into their group and calls and community and just simply joined to learn a specific strategy and have access to resources around that. Which is fine and I think they can serve different purposes. And there is another group I'm in that doesn't put out a ton of content or really sell anything but it's a ton super knowledgeable, super experienced investors that can help with anything.
I think all the points on it being hard and most people will fail, etc are interesting. So much of this business is mindset. I'm in a competitive market (we have a ton of wholesalers and every ibuyer that exists) but there are plenty of deals to be had and no one is going to keep me from getting deals. With that too, having been in a mastermind group for a while you can quickly pick out who is going to be successful by their approach, their interactions, their mindset, etc. There are also people that join and expect the work to be done for them and it just doesn't work that way.
In the world of gurus and masterminds and all that jazz it can be tough to sort of out what's real and what's not. I think there are definitely groups out there that are well worth the price of admission and many times can help you get where you want to be faster.