I'm managing ridiculously heavy equipment alongside herbs just fine. Didnt start the game with more than 15 strength. Trained from 1 to 35 before the potion DC update and then from 35 to 68 and my character is still active. This shouldnt be a factor in validating a persons opinion but seems like thats the way this thread was going.
Changing the weight of the misc thin base item reduces it across all misc thin base items. Making a new base item just for herbalist bags corrects this but its not retroactive so people will need to exchange their apparently 200+ herbalist bags weighing them down 100lbs for something else.
If it used the same base item (which is a lot easier to do) and added a 20% of weight reduction it changes the bag from a 5gp value to a 255gp value.
If people are fine with paying 255gp for a lighter herbalist bag maybe just make an item request thread to have this added in.
Here's the statistics and cost picture for you. Be the change you want to see, go post this exact pic for the item request in the appropriate thread. If people want to buy it so much make the request to add it to the vendors. If you dont do this then you really didnt want what you wanted. Maybe it's a Spidersilk Herbalist Bag which makes it lightweight and strong. Maybe it could be added as a tailoring option later on for MAB77. Who knows?
You can still use the claim merchants to convert 280 herbs weighing 32.2lbs total (2.3x14) to 0.0lbs. You can still use 60% and enchanted 80% total weight reduction bags for all your loose herb pouches to make both them and their contents be effectively redundant in weight. You can still put your 280 weightless claimed herbs into a 0.2lb vaasi leather satchel.
If you dont want to learn how to manage weight then submitting a high cost tax on enthusiasm by paying for multiple 255gp herbalist bags is the way to go.