When your business is small, it’s easy to understand all the domains.
As you grow it’s harder.
Finance gets complicated. Operations gets complicated. Technology gets complicated.
You can’t be expected to be a domain expert on everything, but you must still be in charge.
The answer is find people that are experts, and you can trust.
If you resist, your business will eventually fail.
If you don’t know what’s going, find someone who does.