Anything and everything can be compromised. Some things are easier than others, and some are bigger targets than others, but even those we think of as very secure (with good reason) are not invulnerable. This is not a sign of major issues, this is a timely warning. Do take note, the issue was noticed quickly and steps were taken to fix it quickly, Mint was quite open and forthcoming about it, and if we all checked the checksum like we should, nobody would have gotten bit at all. Number of people affected by this is small, and the number who will still be affected by it in a month will be almost none. I am not going to say it was a good thing, but read it as what it is - a warning.