I think the anti- “thoughts and prayers” meme is more tired than the condolences people offer. Complaining about expressions of sympathy gets zero traction in trying to convince people of policy views.
Here’s the thing: People (aside from mfm) are generally fine with prayer and condolences. What people are complaining about is that the people who have the power to do something about it (politicians) refuse to do something about it. “Thoughts and Prayers,” is a non-answer designed to pacify the masses, rather than anything sincere.