There are always too many things that feel important.
And I think solo makers have the same problem as teams - just with all the voices in the head =D
In a team everyone can have a different priority, the designer might want to polish the UI, developers want to fix backend issues, marketing wants to improve the landing page...
most teams spend a lot of time thinking about user authentication. who can log in, how, with what credentials.
and then the services behind the scenes just... trust each other. because they're on the same network. because they're in the same VPC. because nobody questioned it when the architecture was first drawn up.