Two summers ago, I visited a Tesla Motors (Nasdaq: TSLA) showroom in Los Angeles. I've been hooked ever since. Visiting the company leaves you with a feeling similar to what I imagine those who visited a young Microsoft felt: This company has the potential to change the world. Who knows if it will? But the feeling is there. And it's powerful.

Just don't tell that to most Tesla investors. Legions of investors and reporters are disgruntled over the company's lack of profitability. Most have become absorbed by one line in its IPO prospectus that reads, "We have a history of losses and we expect significant increases in our costs and expenses to result in continuing losses for at least the foreseeable future."

This comment, from the Denver Post, has been the common reaction:

"How does Tesla fulfill the promise and hopes of the investors pumping more than $200 million into this company?" asked John O'Dell, an analyst with the auto blog Green Car Advisor. "This is a company that's never made a profit."

The criticism is justified -- to a point. Tesla bleeds cash, of course. But when I hear these comments, part of me wants to scream "Well, yeah. What do you expect?!" Plenty seem to wonder why Tesla isn't profitable, paying a dividend, and funding a corporate philanthropy foundation. I'd like to offer a snotty but truthful answer: because it's a late-stage start-up company.

Frankly, I'd be worried if a company in Tesla's stage of development were profitable. I'd take it as a sign that it wasn't pushing the boundaries hard enough. No one should buy Tesla with expectations of near-term earnings. You should buy it for the possibility that 10 or 20 years from now, it'll be the next Ford (NYSE: F). Heck, Tesla hasn't even begun producing its first large-scale production vehicle, the Model S. Patience is vital here, folks.

In some ways, I view this as the polar opposite of 1999. Back then, investors balked at companies that were profitable, instead clamoring for start-ups that had nothing to show but a dream that would blow your socks off. At the time, Berkshire Hathaway (NYSE: BRK-A) (NYSE: BRK-B) was written off as a Stone Age relic as Warren Buffett stuck with time-tested, profitable companies.

Are investors being just as unfair to Tesla for the opposite reason? I want to hear what you think in the comment section below.