Fingerprints can be hacked

The uniqueness of fingerprints is also questionable.

e.g.: https://mathblog.com/are-fingerprints-unique/

You can unlock most home doors within seconds even without having the key

Nonetheless, we still lock our doors and thieves often break in, even though picking the lock is both safer and less likely to arouse suspicion.

Your argument makes sense, but we humans aren't really rational

For devices like phones and laptops, this sounds too complicated. Why not instead just use passwords, patterns, etc? I doubt anyone who's genuinely sensitive about their device being secure uses biometrics to unlock it anyway, so this seems to be just a convenience feature for the casual user with minimal security concerns. As such, making it more complicated doesn't seem worth it.

And if we're talking about authenticating people in truly secure environments, my gut tells me that adding a couple more factors to even a simple fingerprint reader ought to be more secure and robust than making a super-complicated fingerprint reader and leaving it as the only factor.

Biometrics have both a high False Acceptance Rate - they will accept invalid input - and a high False Rejection Rate - they will deny valid input. Scanners can be tuned one way or the other, preferring FAR or FRR, but either way, they are kind of unreliable.

This is why multi-factor authentication is a thing. Generally, pick two: something you have, something you know, or something you are.

If the scanner doesn't like your fingerprint this morning, just use your proximity badge instead, and if someone takes a photo of your fingerprint, it's still useless unless they also know your PIN.

The issue is that a lot of our hardware, particularly phones and laptops, is single-factor authentication. And on top of that, this hardware knows the login to a bunch of other very sensitive material, like your bank accounts.

No, the fingerprints are not hacked. The MacBook Pro scanner is.

Fingerprints and biometrics in general are not a secret. Consider your fingerprint like your face. Anyone can reproduce your face, there are cameras everywhere, and it is probably already easy to find on the internet. "Hacking" your face by taking a picture is the most boring "hack" ever.

Now, if I print your face on a piece of paper, wear it as a mask and try to say to a security guard that I am you, normally, he won't let me in. If he does, the problem is not that I managed to make a paper mask with a picture of you, this will always be possible, the problem is that your guard is stupid and you need a better one.

And if your fingerprint scanner can be fooled by a dab of glue and a laser printer, you probably need a better scanner, something that Apple should be able to do. Smartphone manufacturers like Apple are usually good at bringing fancy tech to the masses, and they could work on defeating these old attacks.