How does it matter if it’s going to be diluted anyway? Investors will get their post-money 30% equity, or whatever it is, and rest of the shareholders will keep

How does it matter if it’s going to be diluted anyway? Investors will get their post-money 30% equity, or whatever it is, and rest of the shareholders will keep their proportion of the 70% (and ~50% pre-money gets diluted to ~35% post-money).