Leveraged funds are the safest way for the average investor to get access to leverage because unlike margin there is no risk of margin calls, and your money generally won't go to zero unlike options which are vastly more complicated and can expire.
The reality is that using leveraged funds (or any leverage) is a completely rational move because the average person will never retire wealthy unless they're already making a tech salary or similar.
Investing has always been gambling, even Warren Buffet made his biggest early wins on all-in bets.