Because what Connor said is simply not true. You think Hololive has this level of success simply because they're lucky? No, it's because the talents are willing to learn and improve themselves, with some savvy strategy taken by the company/management (some, not all, mind you). Opening up a new branch for what is basically an uncharted market is a very risky move, and HoloEN only managed to pulled it off because the HoloMyths members are talented, and the company is willing to give them their full support. If all that it took is just some luck, then why can't Nijisanji with their first iteration of NijiEN, the Niji India failed? There's a reason why the other Holomems admired the HoloMyth, even calling them the "Genius Generation".
And if you think anyone can be successful as long as they're part of Hololive, just look at Kiara's numbers now, and also Anya. Their growth suffered a lot because of the mistake both of their own faults and also of the company's. Kiara for being the numberfagging menhera she is, and Anya because she didn't give a fuck at what she's doing.
Putting Holo's success purely on "luck" or "the Lightning in the Bottle Moment" is a massive disservice to the efforts the talents did to improve themselves. Would Subaru became as big as she is now if not for her hardwork? Would Pekora can keep her growth were if not for her almost daily long streams? Same thing is also attributing their success solely because they're "Hololive". Literally almost no one have ever heard of their name before last year, even more people know of Nijisanji than Holo back then.
(Also contributing to Holo's success is the fans, fanworks, and also the clippers, but that's a story for another time)
Edit:
Also what
@ChefKiss said is true, brand name power alone is not a guarantee for success or financial gains. Also a quick reminder, Coco and Kanata said they used to have poor SC results and such. And now what happened now, Coco is one the first SC earner in VTubers history, and that only happened because she put a lot of hard work on her channel