Pure sine wave inverters are more capable of producing cleaner, smoother, quieter, and more reliable electricity to operate appliances and electronics without interference. Plus it provides better protection for sensitive and expensive electronics.
It’s not just Toyota. I had the same issue in my Ford Ranger not using pure sine wave technology. I really don’t understand these manufacturers cutting corners where they should not. Another case in point where they focus on profitability instead of what the consumer wants.
You loose the third brake light capability. However, I guess there are relocation kits. I’ve seen these, but not impressed. Definitely not cosmetically appealing.