If you are boiling water, that's definitely not necessary at all and a waste of time and energy. I do however like your all in one bag method, I may give that a try when I get back to making blocks. I went a little crazy during COVID and had to stop the madness. I am the only one that eats mushrooms so it's easy to get TOO many real quick(especially LM or Coralloides). Turkey Tail and Reishi are one of my favorites to grow(fast spawn, 8 days maybe and I'm a polypore fan), but DAMN they take forever to fruit, I like sending them outside instead of in the Martha, but if you have the room TT does fine inside. I wanted to start a Morel and or Wine Cap(maybe a wavy cap area) patch this year, but didn't get around to it. Goals for next year... always a pleasure.
I have a fast LM culture so I don't find spawn rates to be a problem. The Coralloides was considerably slower, but no issues colonizing with same rate. You said it best though, to each there own, it doesn't matter how you get to the finish line, crossing is ALL that matters. All the Best!