Why is the gravitational force (which causes a RE) so much weaker than the other fundamental forces?
As an REer, I'd like to try to answer on behalf of OP who is currently nowhere to be seen.
Frankly, I don't think I can give a scientific answer to your very tricky question apart from that's the way this universe works, that matters attract each other following a certain law of nature. Now let's imagine a hypothetical universe where the strength of the gravitational force and the strength of the electromagnetic force have been swapped.
In that universe, the gravitational force would have been 10
36 times stronger than the electromagnetic force. All matters would have probably just collapsed into black holes not long or even straight after the beginning. And even if somehow planets and stars could still have been formed, life would have been very difficult to flourish with that kind of gravity. But even if life could have been created, it would have been instantly destroyed by solar winds as there wouldn't have been an electromagnetic field strong enough to act as a shield.
So since the laws of nature in our universe is the way it is then life becomes what it is now. And here we are in front of our computers debating in TFES