Why would they even want to do this? And why would the drivers agree? It's personal information I wouldn't want the world to know.

I'd rather see the G-forces that are being placed on the driver's body (possibly via sensors on the driver's racing suit). I think that would yield more useful information than any heart rates that might be broadcasted. Can't honestly say I'm a fan here.

What’s next? Examining stool samples on the grid?

And when someone crashed and (God forbid) flatlines? Should that be broadcast in high def as well?

F2 has them and it's a bit creepy. Also, why should I care?

I'm not sure about live broadcasting, but it adds a dimension of data to reviewing footage.

If anyone follows speedruns in video gaming, you'll know that HR sensors are common on these streams, and it's interesting to see what happens when they're on world record pace or in a position to set a new record if they don't fuck it up (spoiler alert: it spikes, big time)

It would have been interesting in retrospect to see the HR's of both Hamilton and Verstappen on that lap in Abu Dhabi, or when Lando was getting chased by Hamilton in Silverstone etc - but I agree that live broadcast is asking for trouble during accidents, and adds to an already cluttered onscreen display.

Honestly I'd like to see it introduced in athletics - seeing the HRs of athletes during the 100m or in the closing stages of the 5000m or 10000m would be far more interesting... and make me feel far mor inferior.