Good you found a solution but not sure I believe it.
The button is not a physical up/down button it should not respond physically differently based on pressure. It should respond logically only differently on time pressed, a shorter one to turn on, a longer one to turn off (so not easily accidentally knocked to turn off).
If you’re having to press harder to turn off then its a sign the button is not working well and not transmitting the pressing for 2-3 seconds (that mine requires).
Personally I’d recommend a warranty replacement sooner than later, if you’re having to apply a lot of pressure for a long time, I predict it will eventually not turn on. The extra force particularly, combined with duration, will likely cause the button to be the first part to fail before a normal life.
However if warranty replacement is challenging for you, I’d stop using the power button to turn it off so the (my prediction) limited time til it won’t turn on is extended.
I have the Motion+, a light brief press to turn on, a light 2-3 second press to turn off… if mine was out of warranty and turning off became unreliable, I’d let it auto turn off via disconnecting bluetooth so the button has maximum life just for the press on function.