ICE engines aren't a problem right up until they are.

I had one car where the timing belt broke unexpectedly and because it was an 'interference' engine, that led to damage to the engine head and a piston rod (and could easily have been bad enough to have been irreparable had the timing been a bit different).

Second car, had a loud noise from the engine that resolved on its own while driving up a hill. That car model later has a recall for the engine catching fire. Did I just get lucky? Who knows.

My first car (a minivan), the rear exhaust plate fastener broke while driving and make a noise that could be heard from a mile away... right as I was driving past a bunch of cops on heightened DUI enforcement night. Now I wasn't drinking but I still didn't appreciate my car not only breaking ostentatiously, but buying me a ticket in the process.

A fourth car, also a minivan, had an issue with its automatic transmission where it would struggle to upshift going from first to second gear sometimes. At least once every couple weeks, sometimes more frequent. It was never resolved by the manufacturer or any mechanic we could take it to before we sold it.

Now I did make sure to mention that ICE has evolved a high degree of reliability for a reason, but the fact is that even when the odds of things going bad is low, when there are a multitude of different independent ways for things to go bad (as there are with an ICE engine and drivetrain), the birthday paradox makes it inevitable that something will eventually be an issue.

And even though I had an issue like that with every ICE car I have ever owned, even those I didn't have to take to the mechanic for an issue outside of routine maintenance twice a year. They were more reliable than that, but that wasn't enough to keep them from falling prey to various issues.