Not implying anything. Look at the data. 50 year average return is 10%. Inflation over the same period is 3%. This is despite recessions, wars,etc. It is also the market average. This literally means that you can buy a mutual fund that is indexed to the S&P and have a reasonable expectation that over time you will gain, on average, 7% over inflation. So, as long as your interest rate paid is less than 7%, you will gain more than you will pay. (The 125 year average is just under 10%)
The mistake most amateur investors make is that they look in the short term and freak out. You will have low stretches, but in an 84 month loan term, your odds of losing that bet are miniscule. If you have a halfway decent investment advisor, your returns over that time will be more like 15-30%. Is it possible to lose? Sure. It is more likely that any number of worse things will happen. If I take out a 0% (or even 2.99%) loan, I am absolutely certain I will beat that over the term of the loan. If I don't beat it, it would be due to something so cataclysmic that I wouldn't worry about paying it off. I'm talking significant societal breakdown and/or WWIII, or alien invasions, etc.