Never say never is a lesson I learned long ago. Some tires do require a tool to install. I have removed and installed thousands of tires over my years in the biz and found that when properly used a tire lever is not a hazard when installing a tire. It is a learned technique thus I will not go into it here. The worse tire install issues I ever had were Mavic X238 26" rims mated to Conti Goliath tires. Damned near impossible.
I use the Park tire levers as they seem to work very well for me. Never ever use them in a high leverage situation as they will snap. Had to teach that to the rookie wrenches over the years. In the shop I used a single set of Park tire levers for about 10 years before a rookie got hold of them on my day off and destroyed every one.