That some achieve great success, is proof to all that others can achieve it as well.

One person managing something establishes that the thing is possible, which is different from establishing that it is available to everybody. What an example removes is the excuse that it cannot be done at all, and that is genuinely useful, since a great deal of what stops people is a belief about the category rather than about themselves. Circumstances still differ enormously and no example erases that.

Use it as evidence rather than as pressure. Find somebody who has done a version of what you want, and study the route rather than the result. What you are looking for is the sequence of steps, not proof that you should already be there.