To a degree yes, however I have an ebike and the bosch battery with a it has a 500W battery which is about equiv (if my math is right) to a 28 Ah ryobi drill battery. Those don't exist btw, but if i wanted one and bought 7 4Ah batteries to get the same effect they would cost more than the single ebike battery.
As a single item they are pretty well priced for the power they offer.
I think those batteries have their own BMSs, plus casing etc, that adds to the cost. The story as I can understand it is about being able to swap out individual cells which won't have those overheads.
The battery itself is 3.3kg, so quite comparable to other models, keep in mind it comes with a sturdy aluminum casing.
What we mean by "replacing" is that you can change the cells of the battery yourself (or by asking at your local bike shop), so you don't need to trade-in the whole battery! This makes you gain time and a lot of money!
Pedal powered bikes are very weight sensitive. The average e-bike (at least one that would use a fat battery pack like the on pictured in the article), are less weight sensitive.
The RadKick 7 (which RadPower calls a "lightweight bike" weighs 55 lbs.
Racing bikes like the $10K Trek Domaine Carbon weighs less than 30 lbs, but has a much slimmer (and lower capacity) battery pack than what Gouach seems to be targeting.
I would rather have the whole battery be replacable. And when you want to replace, you trade-in your old one for a discount on the new one.