Question Overclocking the monitor beyond its standard limits.
You should consider going lower rather than pushing it all the way to 100hz.
Could your graphics card handle 100 frames per second in games?
Yes.
Unless it's a 100Hz FPS, it's pointless. I wouldn't personally push a laptop screen beyond its specifications.
What are your thoughts on how much this might harm or shorten the lifespan of the monitor?
I lack sufficient details about the components and their behavior at 100Hz. This decision is up to you.
If anyone could answer please reply!