Add Option to Normalize Gutenberg Styles

[hanneslsm]

I am building Block themes but opinionated styles that I have reset first and additionally bugs that hinders me from doing so makes this job nearly impossible. It would be ideal if it'd be possible to have a blank canvas and building themes on top of it then.

What if there was an option that clears all styles that come from Gutenberg and only make sure that the blocks and HTML elements are displayed correctly across all browsers?
So to say a normalize.css for Gutenberg?

Or, is there a PHP function that disables all opinionated styles? I couldn't find one.

[hanneslsm]

In other words, it must be easier to deregister styles like those: https://github.com/WordPress/gutenberg/blob/trunk/packages/block-library/src/pullquote/theme.scss There is no reason why I would want 4px borders on top and bottom of pullquotes.
Is there any way to do remove those easily before creating a theme?

[hanneslsm]

Status update: Not included to the theme add_theme_support('wp-block-styles'); helped a lot already.
I guess I was confused because all buttons still had the opinionated pill shape style.
https://github.com/WordPress/gutenberg/blob/761c390e3ce0a92a9f4183509074d634799711ef/packages/block-library/src/button/style.scss#L30C1-L31C24
Shouldn't be this in a theme.scss instead?