I'm not gonna defend the guy because he seems like an asshole but I will say that I used to focus heavily on deadlines and I ended up editing large parts of my story out just to meet those deadlines. I scrapped entire characters that probably could have fleshed my world out more in the beginning. But early on, patreon supporters want consistent updates monthly or they don't back you. Plus, I was super new and had zero experience with art, writing, or coding so I literally have to Google everything.
Eventually, I moved away from that model and I just write things at the pace they come to me and my project got way better; spending more time on things that are important to me. I would agree that if you're passionate about something, you'll focus more on details that may be less important to other people. I'm sure I've delayed updates for reasons that people disagreed with but I'm also the one that gets private messages from people complaining that a clock in one room doesn't have the same time as a clock in another room. This guy was crazy to include a scene with someone playing the guitar 'cause if those hand positions weren't on real chords, I guarantee his inbox blew up-- people do that at a staggering rate, lol.
At the end of the day, I think the point he was poorly hinting at is that people that set a date and then meet it at any cost may cut corners because they're just there for the money; those that are passionate about their project will make sure it's ready rather than release complete shit just because they set a deadline. But he def comes across wrong and seems like a jerk. I wouldn't support him just because of his attitude alone. If you were a new dev, you could pretty much just watch this guy and do the opposite and you'd probably run a pretty honest operation.