Solo'd the heroic bunker on the first day, fullly upgraded the bunker by Friday. It can be done by a solo player. But dont expect to if you are putting in a minimal amount of time. You say you are a dad I understand, but then tell your kids as a life lesson "some day you can have what you want for minimal investment of time" obv you would fail as a parent if you said or believed that. So apply that logic here, if your stance this is this a game and not IRL then destiny 2 may not be the game for you.