I agree with all the points you mentioned above and I think that is one of the issues many people are held back by themselves. Actually, we all reach this point from time to time. But the problem with self sabotage is the fact that it is not as easy to overcome as one might think initially. Since we imposed the problem on ourselves subconsciously, you cannot just do it. You first have to admit to yourself that there is something holding you back and you have to work on it actively. There is not quick fix that you do once and the problem is just gone. You will relapse from time to time, and those "relapses" will remind you what you have reached so far.

People often tell you to just "DO IT" (pun intended) but if anyone thinks that issues like this work just like that, they have never really faced such a problem. Just my thoughts about it, but the human brain is a master of hiding fears from ourselves and it is often even better at keeping us distracted from taking a deeper look. Life today is so fast that people rarely get the chance to think about themselves and this only amplifies the topic mentioned by the OP.