I agree with all of your points. But to answer your question regarding charging.

You can buy joy con chargers, I've seen them in stores, they have like a whole stand that also charges your joycon. There are various licensed and unlicensed designs like this. Alternatively I've seen on Ali express, just a cable that splits into two, and can connect to the bottom of the joycon rail, just where the connector is, and can be plugged into a USB-a port.

Another official way to charge them is they in I think only released in Japan, as an arms 2 accessories? I may be wrong pulling this from memory and I don't play arms. They sold joycon aa battery packs. Which were joycon grips, with two aa batteries making them thicker, and also a strap on them.

Lastly Nintendo announced before the switch came out, a charging grip for the joy cons. Like the one that was included with the switch, but it also had a battery that could let you play for even longer, and charge via USB-c. I don't think this was ever released, I misunderstood and thought my release day switch would come with this product, so I was sad to see the grip that came with the switch was only a plastic holder. But I can wager a guess that some other 3. Party accessories maker has released either a licensed charging grip or an unlicensed one.

I haven't seen it, but IMO the best product for me, if I was in a situation where I wanted to use the joycons exclusively on a non switch device. I'd like to have something similar to the official joycon straps, but it had a USB-c port on them for charging.