Disagree. I got other opinion.
People make some unique things as a team. As co-founders. So chat between them and even if it’s slightly others’ advice helps.
Why other advices are not working is that they don’t know nothing not anything.
It’s like why psychology advices on internet doesnt work. Or why just complaining your work issue to a lawyer doesnt fix the problem.
Most people have no time or interest in knowing more so their advice becomes useless. But if they listen more and get to know its nuances they can give a valuable lesson. Even better you can delegate some parts to them.