Low end CPUs generally get high temperature quicker.
This is not correct, lower end CPUs have smaller clock speeds and more powerful CPUs have higher clock speeds and the higher the speed, the hotter the processor gets. It's basic thermodynamics.
CPUs have 3 or 4 built-in speed "levels" they switch between to adjust the clock rate, they don't run at arbitrary speeds in their range.
They also have a turbo mode that temporarily increases the clock speed to a higher limit until the processor gets very hot. This is what happens if you see 100% CPU usage.
Agreed with rest of the stuff but the bolded part above is still a concern. Low end CPUs still heats up quickly because the CPU usage gets high faster than high end CPUs.
Example : Playing a heavy game on a low end processor will heat up the machine faster than playing the same game on a high end processor.
I remember playing GTA vice city on my low end desktop many years back and the CPU used to get freaking hot quickly whereas even if we play GTA V on a high end CPU these days doesn't heat up the CPU that much.