What advantages do vein treatments offer?

A list of advantages can read like a promise, and the two are not the same thing. This page asks what vein treatments offer and checks how carefully the source phrases it.
The answer, with its hedge intact
my.clevelandclinic.org says, "Treatments may reduce your risk of life-threatening complications of venous diseases, such as a pulmonary embolism." The word "may" belongs to the sentence, and it stays here because dropping it would turn a possibility into a guarantee.
Reading the neighboring pages
The wording sits in the publisher's page on venous disease treatment options. For the conditions those treatments address, set the venous disease overview beside the varicose veins overview and compare how each frames the problem before judging what a treatment is for.
The follow-up to ask next
If a treatment can lower the risk of a pulmonary embolism, the reader's next question is whether such an event can be prevented at all. That question has its own page on this site.