If others have made it without getting a mentor, then what’s the difference if you also don’t get any? Success can be learned and develop, a working process wherein you need to prove your own worth and dedication so you can be valuable in the end. And when it happens, there’s no reason why success can’t be guaranteed. You just have to do your own right thing, even without someone that will lead you.
At the end of the day, it all depends on the choices we make, regardless of whether we have a mentor or not, it doesn't matter as long as we are able to plan for the future and strive for our own version of success.
I personally prefer to make a lot of realizations rather than just trying to find a mentor because for me even if there is a mentor but when we cannot do what should be done it will not be able to be successful so instead of forcing to find or get a mentor so that we can be directed to something that is considered success, I prefer to do it independently by continuing to seek relationships and improve the quality of what I have.
That is the best thing to do in the end even if on the way to success we can get a mentor or not as long as our goal remains in the plan it will still be a good thing.