If you're driving 75 mph and the speed limit is 45mph that's reckless.

Assuming the speed limit is 65 and you're driving at 75 that's quite normal but on a 1 hour journey you've saved ~9 minutes. Maybe worthwhile if you're going to the hospital but mostly not worth the stress and increased risk to others.

Also speeding is a major cause of accidents, even before cellphones were pervasive. https://www.iihs.org/research-areas/fatality-statistics/deta.... Also found another report dating back to the 90s that says the same thing but it's a pdf.