It should be obvious that a car is not a smartphone. Apple Inc. is acting as if they’re the same.

It’s no secret that Apple is working on self-driving vehicle technology; it is among dozens of companies that have California permits to test autonomous cars on public roads. Chief Executive Officer Tim Cook, in his way, acknowledged the driverless transportation project in a 2017 Bloomberg Television interview, and the company last week confirmed earlier reports that it had acquired autonomous vehicle startup Drive.ai.

And yet Apple remains far more closed than its peers. Alphabet Inc.’s Waymo, Uber Technologies Inc., Tesla Inc., General Motors Co.’s Cruise and other companies working on this technology talk fairly openly about their broad ambitions for autonomous transportation, milestones in progress and issues for the industry. Apple does none of this.

It’s always Apple’s tendency to keep mum about a product in development until it’s perfect and ready for a world debut. But driverless cars are not smartphones or augmented reality glasses. Emerging technologies, particularly those that have the potential to save human life and also to take lives, need an open debate and deserve a relatively transparent process — warts and all.

Driverless cars have the potential to transform the nature of cities, upend a country’s workforce, impact the environment and necessitate revisions to laws and ethics. The public is not well served by Apple’s inclination against engaging on a subject of such importance. Apple may not be well served by its approach, either.

The driverless car industry as a whole has not been an open book. Advocates, and some regulators, have pushed companies to disclose far more than they do about safety metrics and to collaborate with rivals to ensure better and safer progress on autonomous technology. But Apple is taking the industry’s discretion to the absurd.

Cook reiterated to stock analysts that Apple is interested in autonomous technology and has “a large project going and are making a big investment in this.” And that’s about it. “I don’t want to go any further with that,” Cook said. He’s been similarly vague since then.

By comparison, Waymo executives regularly talk about the implications of driverless car technology and its potential drawbacks. In Alphabet’s most recent earnings call, executives talked about opening a Michigan facility with dedicated autonomous vehicle production, explained Waymo’s focus on Uber-like ride services and mentioned making its in-house vehicle sensors available to outside companies. Last week, an Alphabet executive answered a shareholder’s question about how autonomous vehicles might affect tax revenue.

For Apple investors, driverless technology is a “free optionality” for long-term stock owners, CFRA Research said this week. The costs are already being absorbed. Apple’s operating margin is at its lowest level in a decade as a share of revenue. Largely that’s because spending on research and development — which presumably includes Apple’s driverless car project — amounted to 6 percent of Apple’s revenue in the last 12 months. It was 3 percent just five years ago.

It’s possible Apple is keeping mum about driverless technology because openness is not in the company’s DNA. Or maybe Apple’s laggard status in the technology explains its silence. California regulatory reports show that Apple’s autonomous test cars require more intervention by human backup drivers than many other companies’ prototypes. (There is debate about whether this data is the best measure of progress, but it’s one of the few available publicly.)

Apple has the power to shape public perception in a way that maybe no other company can. It uses that power to sell smartphones, of course, but also to win people over to the company’s views of U.S. immigration policy, the importance of teaching software coding to children and the pernicious effects of social media.

Driverless cars won’t be ubiquitous on public roads for many years, but policies and public perception are being set now. People in the U.S. are skeptical about driverless cars, and if nothing else, a little more engagement from Apple might help change opinion.