It feels pretty crummy to play your commander and an opponent removes it right away
The Sideboard The cards in our sideboard are designed to do three things: help improve our matchup against aggressive creature decks (by far our worst matchup), fight three-mana planeswalkers (especially Teferi, Time Raveler but also Narset, Parter of Veils and Oko, Thief of Crowns), and answer graveyard-based decks (which we actually help by filling their graveyard with our mill spells)
Golgari is good at sacrificing creatures and utilizing its graveyard
This means that Bolt Storm will have a more stable damage output throughout the game, and have an easier time scaling higher
Check retail tie-ins
After all, youve first got to get through the first two Radical Ideas, and then two more, before youre even ahead. You can discard a Radical Idea to Jump-start another, but youre still talking about sacrificing some of the selection youre supposed to be getting