Therein are many problems within business and fishing, the need to make money.
I've had run-ins in the past with Simon Pomeroy over someone using a huge single hook for pike fishing. He doesn't like people disagreeing with him!
I have tried Stonze, in various sizes and they cast like a bag of spanners, more wobble than Jessica Rabbit.
For short range fishing, fine.
For the potential camouflage aspect, fine.
For any distance, yuck.
Pushing Dropping the lead was another business invention, the more leads you drop, the more you sell...
The original reason for the invention of the Lead Clip was the ease of removing the lead at the end of the session, or changing lead size during the session! It provided a way of being able to fish semi-fixed without attaching tubing over the hooklink swivel, to hold a lead bead in place. Instead of buying 2 items you bought 1.
I hate dropping the lead; in most cases there is no need, even in weedy waters.
I have fished very weedy waters, and never found the need to drop the lead. Personally I used to use Zipp (Distance) shaped 1oz to 3oz inline leads in weed, and had few problems. As long as the lead has no shoulder, no weed catching. Your hook catches more on the retrieve.
Gawd, imagine trying to play a fish through weed with a Stonze inline or not!
That's not to say I don't lose leads; a snap-off thanks to pike or swan swimming through the line, an occasional quick clip and the lead pinging off the clip during the fight.
However, there is an environmental issue, both as @greekskii says from microplastics, and the amount of lead in various waters, lost or 'dumped' tackle.
Dumping the lead is really decriminalised littering, pollution, I do recall something about fishing weights being lead was raised in the EU Parliament. We are not just thinking freshwater fishing here, we have to include sea fishing, both beach, boat and commercial as all use lead weights. There is potential for a ban, and even though we are no longer part of the European Union.