It may have been somewhat more risky back then -- in terms of fatalities per mile traveled, if not fatalities per hour traveled -- but I don't think that's perfectly clear. A fall from a horse, which has happened to me more than once, is a lot less injurious than an automobile accident. It would be interesting to see a comparison table.
Besides, the risks didn't stop every enterprising English and Protestant German youth from embarking upon the Grand Tour: https://en.wikipedia.org/wiki/Grand_Tour