Ignorance is not necessarily a sin, but the truth is more nuanced than that. What we cannot argue with though is the fact that God discourages ignorance. Hosea 4:6 says My people are destroyed for lack of knowledge. That simply means my people perish due to ignorance.
To understand the circumstances under which ignorance may be considered a sin or not we have to look at the source of the ignorance.
Is the ignorance due to sloth or laziness?
Sloth is one of the 7 deadly sins. It leads to ruin for both yourself and those under your care. It might lead to other sins too. For example, your sloth will bring you poverty and this might lead you to theft and other shady habits just to get by.
If you know there are some things you need to study and learn about but are reluctant to do so because of your laziness, then your ignorance might be considered a sin in the sight of God.
Ignorance might make it hard for you to access everything God has for you.
Ignorance affects our interaction with God and the enemy. It makes us unaware of how to respond to life’s issues with the authority and privilege God has given us.
The enemy also takes advantage of our ignorance, inflicting suffering that we normally shouldn’t be going through.
Ignorance hinders our collective advancement as humans
Our collective strife for kno2ledge has made every sphere of life easier from medicine communication to transport. Your reluctance to study the world around you might be seen as ingratitude. You cannot appreciate what you do not understand. Get as much knowledge as you can to unlock everything God has in store for you.