Why would it be catastrophic? That kind of reliability works just fine for other luxury brands. Tesla's should naturally be better anyway due to the simpler drivetrain and lack of maintenance.
Eh, their reliability is much worse than other brands, even luxury brands.
https://www.truedelta.com/car-reliability-by-brand?min=2016&...
https://www.consumerreports.org/car-reliability-owner-satisf...
If it "works" it's great. But, once out of warranty it can be expensive and delayed before you can get your car fixed. On my S, I had to replace 3 door handles, drive unit, screen, TPS, passenger mirror was replaced, and a few other things. This was ~3 years of ownership and < 30k miles. Many of these things had a long delay before they could get fixed. I was in a loaner for over 3 weeks while they fixed the drive unit.
My father had an X that got bought back due to never being able to fix the rear door sensor. It would open a foot and freeze. He also had a handful of other issues. This was in less than a year of ownership.
My neighbor with the 3 got into an accident. It's ~6-8 months for them to fix their rear bumper. Additionally, one of the seatbelt adjusters and one of the AC vents rattle. So he stuck a piece of foam in there. His charging port has frozen and needed a manual release. And he says the screen sometimes doesn't come on. The nearest dealership is 100 miles away. He got an appointment, drove, got a loaner, drove home. They were 'Unable to reproduce' the rattles/screen issue. So he had to drive back and pick up his car with nothing getting fixed.
Additionally, the screen was working when they were there.
I would rather buy a car for more money that's engineered to the best possible attainable engineering perfection than one that is not.
Often, those more reliable cars are even cheaper and made in massive production. Given Teslas goal of accelerating the change to sustainable energy, it would be in their best interest to make the best possible and reliable car they could at the highest possible production numbers, instead of leaving a competitive advantage for toyota to take over reliable scalable production. Besides I would argue the purpose of the model 3 is a mass market vehicle that is really nice, and not just a niche "luxury" vehicle as is often implied.
Toyota would more often choose the latter, BMW the former.