That's kind of my whole point. If you're pursuing the kind of venture that simply won't work unless you have 100% of your time to work on it, then this makes sense. I just think that this is the case far less often than people think it is and it's certainly not the case for OP.
It's also useful for ventures where 100% time is not necessary though. The 'burning your ships' approach can be much more effective in reaching your goal. Not always, but often, to the point where I err on the side of, uh, burning.
And 'burning your ships' usually isn't quite as drastic and irreversible as it appears anyways.
Let me use friendships and social circles as an analogy. I've had periods in my life where I felt stuck socially. I kinda liked my social circles, I kinda liked my friends, but I yearned for something new or better. I didn't know exactly what though.
At first I tried to go to meetups and activities to meet new people. That worked at first, but it turned out to be very difficult to keep up. Because if I had the choice of meeting a bunch of perfectly fine friends on a Friday evening after a busy week, why would I opt instead for a bunch of strangers that one day might, or might not, become new friends? So at some point I just moved to another city, which for me was not such a huge deal, but still a pretty big step. And it worked very well. I had to go and make new friends. And it turned out that I didn't lose the old friends, not the ones that mattered anyways. In fact, those old friendships got a new shine and freshness.
That said, I did try a less drastic approach at first, and perhaps that's generally a good idea. But there's no substitute for forcing a change, because doing so incrementally can be quite difficult.
