If this is the study I'm familiar with, the results were found not to be dependent on route of administration. Those who ate edibles had cardiovascular effects, too.

The same study did find that smoked marijuana induces the same changes in blood that smoking cigarettes do, and those changes lead to CVD, cancers, etc in tobacco smokers.

edit: This is what I'm thinking of: https://pubmed.ncbi.nlm.nih.gov/40434782/

also it's often mixed with tobacco when smoking it.. so maybe it's just the tobacco -.^

The linked study controls for this.

Most of the time, if you read the headline for a study, and instantly have a thought that would make the entire study's results pointless, it's very very probable the study authors had that thought too and mitigated it. It's their job.

Depends on who they are working for.

The leaves aren't smoked. Its the female flowers.