A lot of these tools aren't even time optimizations at the hobbyist level.

There's been so many times I've had to saw say a meter of plywood, by the time I've gotten out the circular saw, plugged it in, taken the extra safety precautions such a power tool needs, sawed the wood, then spent more time afterwards cleaning up.

All to realize that I've spent maybe 5-10 minutes in total (almost entirely setup time) making a cut with a powertool I could have just made in 2-3 minutes max of very leisurely sawing with the handsaw I already had at hand right next to me