I know that I personally became a much better cook - and specifically, since you mention it, much better at cooking steak - after learning the science behind it.

I do agree that they're not essential to learning how to cook. Millions of people cook without knowing these things. But for people with a specific mindset, they are likely to be helpful if more "traditional" routes don't gel well for them.

I largely agree with this. I love my crock pot. Very easy and simple to make very tasty delicious meals. And you can leverage the timing by doing things like turning it on before leaving for work in the morning, and then come home to a hot, tasty, home-cooked meal.

(This is assuming you're comfortable leaving a heat based appliance turned on. In the case of a crock pot, I am. YMMV)

And even better it lets you make large enough batches for multiple days.

Exactly, this is a great feature of slow cookers. I bought one of the larger ones for this exact reason.