It's worse in that there is now no common way to say what it used to mean, without adding several more words, where previously one would have communicated the meaning clearly.
Anytime a language change increases the likelihood of misunderstanding it definitely has negative effects. It may also have positive effects, but it shouldn't be simply accepted without regard to that.
Now, disagreement on whether a particular change's negative outweighs its positive is going to happen, obviously, but it's important to acknowledge the bad parts exist.
It's also important not to accept a mistake and insist that it's fine because language changes, out of pride and desire to not be mistaken - a trend I definitely see a lot. It's often not 'I am using this word in a different way and have considered it's implications', it's 'I don't want to be wrong so I will insist that I didn't make a mistake, language changes!'