Isn’t this backwards? They don’t validate a patent but assume it is until it is invalidated.
I know you didn't draw the connection explicitly, but I just wanted to point out that in this particular case, Masimo isn't a patent troll - they're a company that sells actual devices - https://www.masimopersonalhealth.com and is listed on the NASDAQ with market cap of $6 billion.
What does expressing their legal rights / etc have to do with morality?