Earlier quoted context omitted.
The racism comes from saying "We recognise human faces" and then not recognising a significant proportion of humans.
That's not racism, that's laziness. Or perhaps just being a bad engineer, if you want to be more cynical about it. It's not that hard to find both conscious and subconscious examples of systemic or individual racism. Engineers taking the easy path with webcam facial recognition is probably not a good one and serves only to give more fuel to those who claim people jump to the racism cry too quickly.
Laziness and racism aren't mutually exclusive. Historically in America, white people haven't considered black people as fully human. You can read the various declarations of secession or the 3/5ths compromise for that. Or the long post-Reconstruction history of slightly more subtle ways.
Sure, laziness was involved here. But deciding a product was good enough to ship without caring that it worked for black people requires the effective belief that black people didn't really count as people. At least, not people that mattered. Imagine the reverse: if the product didn't work on white men, would it have been shipped? Of course not.
When laziness just happens to have a blatantly racist outcome in a place where there is a centuries-long history of racism, Occam's Razor suggests the explanation is racism. If laziness could not have caused the bad outcome to happen for white people, then it's pretty clear that pure laziness is not the real cause. It's instead white people being differentially lazy when it comes to black people. That's clearly racism.
As a confirmatory example, look at the American justice system. In a lot of places and times, the same nominal laws applied to white and black people. But they were enforced very differently. Serious crimes against black people were ignored. Minor infractions by black people were enforced vigorously. [1] Were the cops lazy? Sure, everybody's lazy sometimes. Was that why there was a racially different outcome? Definitely not.
[1] Examples of this are all over Loewen's "Sundown Towns" for example.