The reason you see more MTT than cash game streamers is that cash is insanely hard to stream without torching EV. When you stream cash, you’re broadcasting your strategy to sharps who can literally waitlist your table.
MTTs don’t work like that. You’re more insulated from snipers, and your edge comes from the entire field, not just the players at your table. When the maniac busts on Table 3, the reg on Table 11 benefits (along with everyone else).
Cash is "mano a mano". You eat what you kill. Any info you give out directly hits your winrate.
That’s also why cash streamers skew more balanced: it’s hard to be truly exploitative while telling your opponents exactly how you exploit them.