Einstein, who loves physics, is not good at mathematics on the whole, but he is very interested in geometry, so he prefers to express physical laws with geometric logical thinking.
While working in the patent office, he was an auditor and received many application materials for new theories from physicists. Because he likes physics, he has the opportunity to fully read and study these materials. So he knew more about the problems in the physical field at that time.
After he found that physics was fruitless because of the wrong experimental method of McMahon, he came up with the idea of abandoning ether and replacing it with light.
The speed of light is constant relative to the ether, which cannot be captured by the ether. Why not abandon the ether and use light instead? But unlike other substances, the speed of light cannot be assumed to be zero, that is to say, light cannot be set at rest, so it can only be assumed to be a constant value. This was his initial idea of establishing the theory of relativity.
As mentioned above, his mathematics is not very good, so although he founded the theory of relativity, he can't completely deduce and prove some mathematics himself, so he needs to find some physicists and mathematicians to help him prove and deduce. Moreover, the nature of his work in the patent office has made him know many scientists, so many people are willing to help him complete some proofs.
On the other hand, due to his convenient working conditions in the patent office, his theory of relativity was patented very smoothly. If it were someone else, maybe such a theory would be excluded from the threshold of science.
It can be seen that without the experience of working in the special bureau, he would not have become a world-famous scientific great man.
In this sense, such examples are numerous.
For example, like a celebrity who went to college, maybe it was his experience that made his career.
For example, an editor becomes a famous writer because it is more convenient to publish his own articles than others.