I thought the same thing as you the first time I tried it. I mixed it pretty weak to test it out.
Guess what? The plants loved it! I would almost have to say it helped the growth rate.
I think the big advantage to staying with organic pesticides is it's not just healthy for you but it's also healthy for your plants.
The only thing wrong with the garlic/pepper spray is the smell. It would great on your outdoor stuff.
Up here in the NW we don't worry about pests outdoors. It's the bunnies and deer that will destroy your crop.
Time for a SB story:
One time me and my buddy decided to plant about 15 clones up in the hills.
We worked for weeks hauling manure and water. Digging holes and getting everything ready was back breaking work.
We hauled gallons of water up steep hills in the hot sun. The plants grew to about 3ft. high within a month or so.
Then one day we came back and every mother fucking plant was eaten down to the ground! Rabbit turds everywhere.
It looked like they had a big fucking rabbit orgy! I bet they all got high as a kite and then fucked like humans...
The next year we fenced off an area and had no problems. Around the end of July I'm like "fuck this" Water is too fucking heavy. Indoors is the only way.