>>115365490Organic makes more sense. Peter just doesn't have the income or infrastructure to be producing the ridiculous amounts of super materials necessary to produce web that's anywhere as useful as he needs, much less in the quantity.
Plus, it would make him a huge hypocrite; since, if he had such technology, he could help way more people by commercializing it. It would have applications all the way from police and emergency response to construction and even space technology. But instead he keeps it to himself to do unlawful vigilante work.
And in the end, it just turns into a cheap plot device; sometimes, his canisters can contain web to bust down a whole crime organization, other times, it has half the amount needed to take down one big bad.