There is another similar quote that I think fits your roommates situation.

"Somebody has said that dust is matter in the wrong place. The same definition applies to nine-tenths of those called lazy. They are people gone astray in a direction that does not answer to their temperament nor to their capacities. In reading the biography of great men, we are struck with the number of "idlers" among them. They were lazy so long as they had not found the right path; afterwards they became laborious to excess. Darwin, Stephenson, and many others belonged to this category of idlers." - Peter Kropotkin

Undiagnosed ADHD, their brain is meant to be hunting and gathering

Ask me how I know

This is exactly it. We never know what each other is struggling with that limits their capacity to do things, we don't know what supports they need to succeed.

Some people are just lazy and shitty.

For example: Trump supporters are mentally lazy and shitty. We don't go around excusing them for their shitty beliefs just because "they tried hard."

We don't excuse anti-vaxxers because they "tried hard doing their own research."

I wish reality lived up to our egalitarian values but it just doesn't.