How to overcome dislike for using ready-made solutions?

Question

Node.js

I am switching from php to node.js for use in my own project and I understand that a lot here is tied to the use of third-party modules. How to overcome dislike for using ready-made solutions? It is embarrassing when the size of the code of the connected libraries is several times larger than the code of the project itself, which, it seems to me, affects the speed of the project. And there is no understanding of how it works "under the hood", for example, suddenly there are security holes there.
Who had similar problems, share what influenced you to start using ready-made solutions?

Answer 1

As a rule, any third-party module in npm has sources on github, you can read the code and roughly understand how it works. There are also issues where you can see the available known issues.
In general, the probability that a popular module, used by thousands and millions of developers, will make a mistake and none of these people will find it all this time is much lower than if you make a mistake in your code.