My brother in Christ, have you heard about our lord and saviour the Scientific Method and the proliferation of cross-domain ideas? How do you imagine the li-ion batteries came about as the go-to energy storage solution? Incremental improvements of ideas would be my guess, ideas have to start somewhere and of course they’re going to be hyperbolic since researchers are both excited and have to draw attention to their ideas.
I sympathise with your point but the alternative is little to no research into different battery technologies because close to nothing will ever emerge as a competitive day-one drop-in replacement, but some ideas may prove exciting to others who understand the value and they might push the ball further towards realistic alternatives.
I’ve found myself in similar situations. However I haven’t taken full three weeks off; I think my longest has been about 10 days.
I’ve always relished getting back to it with a clear mind and often a well thought out plan and it feels like the features flow faster from the fingertips.
Never fight taking a bit of time off, it grants perspective and lets you decompress, don’t think that can ever be a bad thing (given there’s nothing you really need to be doing in that time to make sure you’ve got a steady income)