difficulty – What does it mean to make mining more difficult?

Really I don’t know nothing about bitcoin but now I got curious read something and immediately come to something on mind.

I mean, there’s a social economic comunity somewhere generating value based on the transactions registered, but as they’re cheap and bitcoin wants to add value it adds some senseless? dificulty.

By the other way there’s a full community of scientists and mathematicians fighting for devealing mysteries of nature and knowledge, but most often they don’t have the economic resources for their task, hence there’s a lot of simulations and sequances to solve and here we have a lot of people wasting non renovable resources adding up to climate change doing useless calculations just to generate esteemed value.

Do you see the equation here? If the difficulty added be practical intead of needed, bitcoin would be based on real value, even the mayor value of all that is knowledge.

So Instead of do nothing in order to increase value why not solve some practical mathemathical sequence or do x simulation of some deterministic experiment and share the results with science?

Or am I being the idiot that believes that the world has solution with a naif approach?