Is science too much about assumptions?

[SxyxS]

You need Assumption-
without Assumption there'll be almost no progress,or a very slower one.

Big scientific discoveries were almost never made by guys who just follow rules like clerks in a minion like style.
You need Ideas,Inspiration and out of the box thinking.
Even if 99% of those ideas turn out to be bullshit the 1% may change the world.
People like Heissenberg,Plank,Einstein,Poincare,Newton or Tesla made their discoveries because they were dissatified by the official standards of science ,made assumptions and changed standards.
I don't believe in parrallel universes or 11D -Space as i think the universe gives a shit about human theories and the current dark matter theory proves how little we really know as we created dark matter out of thin air to keep
the current and acceppted theory about the evolution of universe alive.

If the main and basic matter of this universe is something we know nothing about(dark matter) than assumption is the only way to go on is assumption or we prove this theory is just cargo cult science.